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- [1] COVID-19 infections in infantsScientific Reports, 12Małgorzata Sobolewska-Pilarczyk论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumMaria Pokorska-Śpiewak论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumAnna Stachowiak论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumMagdalena Marczyńska论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumEwa Talarek论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumAgnieszka Ołdakowska论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumIzabela Kucharek论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumAdam Sybilski论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumAnna Mania论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumMagdalena Figlerowicz论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumKatarzyna Mazur-Melewska论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumPaulina Potocka论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumArtur Sulik论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumBarbara Hasiec论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumMartyna Stani论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumPaulina Frańczak-Chmura论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumBarbara Szczepańska论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumIlona Pałyga-Bysiecka论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumPrzemysław Ciechanowski论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumJoanna Łasecka-Zadrożna论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumIzabela Zaleska论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumLeszek Szenborn论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumUrszula Dryja论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumErnest Kuchar论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumSławomira Niedźwiecka论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumBolesław Kalicki论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumRobert Flisiak论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium MedicumMałgorzata Pawłowska论文数: 0 引用数: 0 h-index: 0机构: Nicolaus Copernicus University,Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium Medicum
- [2] COVID-19 infections in infantsSCIENTIFIC REPORTS, 2022, 12 (01)Sobolewska-Pilarczyk, Malgorzata论文数: 0 引用数: 0 h-index: 0机构: NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandPokorska-Spiewak, Maria论文数: 0 引用数: 0 h-index: 0机构: Med Univ Warsaw, Dept Childrens Infect Dis, Warsaw, Poland Reg Hosp Infect Dis, Warsaw, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandStachowiak, Anna论文数: 0 引用数: 0 h-index: 0机构: NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandMarczynska, Magdalena论文数: 0 引用数: 0 h-index: 0机构: Med Univ Warsaw, Dept Childrens Infect Dis, Warsaw, Poland Reg Hosp Infect Dis, Warsaw, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, Poland论文数: 引用数: h-index:机构:Oldakowska, Agnieszka论文数: 0 引用数: 0 h-index: 0机构: Med Univ Warsaw, Dept Childrens Infect Dis, Warsaw, Poland Reg Hosp Infect Dis, Warsaw, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandKucharek, Izabela论文数: 0 引用数: 0 h-index: 0机构: Ctr Postgrad Med Educ, Dept Pediat 2, Warsaw, Poland Minist Interior, Cent Clin Hosp, Dept Pediat & Neonatol, Allergol Ctr, Warsaw, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandSybilski, Adam论文数: 0 引用数: 0 h-index: 0机构: Ctr Postgrad Med Educ, Dept Pediat 2, Warsaw, Poland Minist Interior, Cent Clin Hosp, Dept Pediat & Neonatol, Allergol Ctr, Warsaw, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandMania, Anna论文数: 0 引用数: 0 h-index: 0机构: Pozna6 Univ Med Sci, Dept Infect Dis & Child Neurol, Poznan, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandFiglerowicz, Magdalena论文数: 0 引用数: 0 h-index: 0机构: Pozna6 Univ Med Sci, Dept Infect Dis & Child Neurol, Poznan, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandMazur-Melewska, Katarzyna论文数: 0 引用数: 0 h-index: 0机构: Pozna6 Univ Med Sci, Dept Infect Dis & Child Neurol, Poznan, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandPotocka, Paulina论文数: 0 引用数: 0 h-index: 0机构: Med Univ Bialystok, Dept Pediat Infect Dis, Bialystok, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandSulik, Artur论文数: 0 引用数: 0 h-index: 0机构: Med Univ Bialystok, Dept Pediat Infect Dis, Bialystok, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandHasiec, Barbara论文数: 0 引用数: 0 h-index: 0机构: Prov Jan Bozy Hosp Lublin, Dept Childrens Infect Dis, Lublin, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandStani, Martyna论文数: 0 引用数: 0 h-index: 0机构: Prov Jan Bozy Hosp Lublin, Dept Childrens Infect Dis, Lublin, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandFranczak-Chmura, Paulina论文数: 0 引用数: 0 h-index: 0机构: Prov Jan Bozy Hosp Lublin, Dept Childrens Infect Dis, Lublin, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandSzczepanska, Barbara论文数: 0 引用数: 0 h-index: 0机构: Jan Kochanowski Univ, Coll Med, Kielce, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandPalyga-Bysiecka, Ilona论文数: 0 引用数: 0 h-index: 0机构: Jan Kochanowski Univ, Coll Med, Kielce, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandCiechanowski, Przemyslaw论文数: 0 引用数: 0 h-index: 0机构: Reg Hosp Szczecin, Dept Pediat & Infect Dis, Szczecin, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandLasecka-Zadrozna, Joanna论文数: 0 引用数: 0 h-index: 0机构: Reg Hosp Szczecin, Dept Pediat & Infect Dis, Szczecin, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandZaleska, Izabela论文数: 0 引用数: 0 h-index: 0机构: Wroclaw Med Univ, Dept Pediat & Infect Dis, Wroclaw, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandSzenborn, Leszek论文数: 0 引用数: 0 h-index: 0机构: Wroclaw Med Univ, Dept Pediat & Infect Dis, Wroclaw, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandDryja, Urszula论文数: 0 引用数: 0 h-index: 0机构: Med Univ Lodz, Dept Pediat Infect Dis, Lodz, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, Poland论文数: 引用数: h-index:机构:Niedzwiecka, Slawomira论文数: 0 引用数: 0 h-index: 0机构: Pomeranian Ctr Infect Dis & TB Gdansk, Dept Pediat Infect Dis, Gdansk, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandKalicki, Boleslaw论文数: 0 引用数: 0 h-index: 0机构: Mil Inst Med, Dept Pediat Pediat Nephrol & Allergol, Warsaw, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandFlisiak, Robert论文数: 0 引用数: 0 h-index: 0机构: Med Univ Bialystok, Dept Infect Dis & Hepatol, Bialystok, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, PolandPawlowska, Malgorzata论文数: 0 引用数: 0 h-index: 0机构: NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, Poland NicolausCopernicus Univ, Coll Med, Fac Med, Dept Infect Dis & Hepatol, Bydgoszcz, Poland
- [3] COVID-19 in ChinaBULLETIN OF THE WORLD HEALTH ORGANIZATION, 2023, 101 (02) : 84 - 85不详论文数: 0 引用数: 0 h-index: 0
- [4] The Analysis of Patterns of Two COVID-19 Outbreak Clusters in ChinaINTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH, 2022, 19 (08)Li, Wenning论文数: 0 引用数: 0 h-index: 0机构: Chinese Acad Sci, Natl Engn Res Ctr Geoinformat, Aerosp Informat Res Inst, Beijing 100094, Peoples R China Univ Chinese Acad Sci, Beijing 100049, Peoples R China Chinese Acad Sci, Natl Engn Res Ctr Geoinformat, Aerosp Informat Res Inst, Beijing 100094, Peoples R ChinaGong, Jianhua论文数: 0 引用数: 0 h-index: 0机构: Chinese Acad Sci, Natl Engn Res Ctr Geoinformat, Aerosp Informat Res Inst, Beijing 100094, Peoples R China Univ Chinese Acad Sci, Beijing 100049, Peoples R China Chinese Acad Sci, Natl Engn Res Ctr Geoinformat, Aerosp Informat Res Inst, Beijing 100094, Peoples R ChinaZhou, Jieping论文数: 0 引用数: 0 h-index: 0机构: Chinese Acad Sci, Natl Engn Res Ctr Geoinformat, Aerosp Informat Res Inst, Beijing 100094, Peoples R China Chinese Acad Sci, Natl Engn Res Ctr Geoinformat, Aerosp Informat Res Inst, Beijing 100094, Peoples R ChinaFan, Hongkui论文数: 0 引用数: 0 h-index: 0机构: Tianjin Cheng Jian Univ, Sch Geol & Geomat, Tianjin 300384, Peoples R China Chinese Acad Sci, Natl Engn Res Ctr Geoinformat, Aerosp Informat Res Inst, Beijing 100094, Peoples R ChinaQin, Cheng论文数: 0 引用数: 0 h-index: 0机构: Chinese Acad Sci, Natl Engn Res Ctr Geoinformat, Aerosp Informat Res Inst, Beijing 100094, Peoples R China Univ Chinese Acad Sci, Beijing 100049, Peoples R China Chinese Acad Sci, Natl Engn Res Ctr Geoinformat, Aerosp Informat Res Inst, Beijing 100094, Peoples R ChinaGong, Yujiang论文数: 0 引用数: 0 h-index: 0机构: Zhejiang CAS Applicat Ctr Geoinformat, Jiaxing 314100, Peoples R China Chinese Acad Sci, Natl Engn Res Ctr Geoinformat, Aerosp Informat Res Inst, Beijing 100094, Peoples R ChinaHu, Weidong论文数: 0 引用数: 0 h-index: 0机构: Zhejiang CAS Applicat Ctr Geoinformat, Jiaxing 314100, Peoples R China Chinese Acad Sci, Natl Engn Res Ctr Geoinformat, Aerosp Informat Res Inst, Beijing 100094, Peoples R China
- [5] COVID-19 Infection in Newborn InfantsIndian Journal of Pediatrics, 2021, 88 : 394 - 394Dwayne Mascarenhas论文数: 0 引用数: 0 h-index: 0机构: Seth GS Medical College and King Edward Memorial Hospital,Department of NeonatologyMedha Goyal论文数: 0 引用数: 0 h-index: 0机构: Seth GS Medical College and King Edward Memorial Hospital,Department of NeonatologyNitu Mundhra论文数: 0 引用数: 0 h-index: 0机构: Seth GS Medical College and King Edward Memorial Hospital,Department of NeonatologyAnitha Haribalakrishna论文数: 0 引用数: 0 h-index: 0机构: Seth GS Medical College and King Edward Memorial Hospital,Department of NeonatologyRuchi Nanavati论文数: 0 引用数: 0 h-index: 0机构: Seth GS Medical College and King Edward Memorial Hospital,Department of NeonatologyGita Nataraj论文数: 0 引用数: 0 h-index: 0机构: Seth GS Medical College and King Edward Memorial Hospital,Department of Neonatology
- [6] COVID-19 Infection in Newborn InfantsINDIAN JOURNAL OF PEDIATRICS, 2021, 88 (04): : 394 - 394Mascarenhas, Dwayne论文数: 0 引用数: 0 h-index: 0机构: Seth GS Med Coll, Dept Neonatol, Mumbai 400012, Maharashtra, India King Edward Mem Hosp, Mumbai 400012, Maharashtra, India Seth GS Med Coll, Dept Neonatol, Mumbai 400012, Maharashtra, IndiaGoyal, Medha论文数: 0 引用数: 0 h-index: 0机构: Seth GS Med Coll, Dept Neonatol, Mumbai 400012, Maharashtra, India King Edward Mem Hosp, Mumbai 400012, Maharashtra, India Seth GS Med Coll, Dept Neonatol, Mumbai 400012, Maharashtra, IndiaMundhra, Nitu论文数: 0 引用数: 0 h-index: 0机构: Seth GS Med Coll, Dept Neonatol, Mumbai 400012, Maharashtra, India King Edward Mem Hosp, Mumbai 400012, Maharashtra, India Seth GS Med Coll, Dept Neonatol, Mumbai 400012, Maharashtra, IndiaHaribalakrishna, Anitha论文数: 0 引用数: 0 h-index: 0机构: Seth GS Med Coll, Dept Neonatol, Mumbai 400012, Maharashtra, India King Edward Mem Hosp, Mumbai 400012, Maharashtra, India Seth GS Med Coll, Dept Neonatol, Mumbai 400012, Maharashtra, IndiaNanavati, Ruchi论文数: 0 引用数: 0 h-index: 0机构: Seth GS Med Coll, Dept Neonatol, Mumbai 400012, Maharashtra, India King Edward Mem Hosp, Mumbai 400012, Maharashtra, India Seth GS Med Coll, Dept Neonatol, Mumbai 400012, Maharashtra, IndiaNataraj, Gita论文数: 0 引用数: 0 h-index: 0机构: King Edward Mem Hosp, Mumbai 400012, Maharashtra, India Seth GS Med Coll, Dept Microbiol, Mumbai, Maharashtra, India Seth GS Med Coll, Dept Neonatol, Mumbai 400012, Maharashtra, India
- [7] COVID-19, automation in ChinaControl. Eng., 2020, 7 (06):Shi, Stone论文数: 0 引用数: 0 h-index: 0
- [8] Cartooning COVID-19 in ChinaCRITICAL ARTS-SOUTH-NORTH CULTURAL AND MEDIA STUDIES, 2023, 37 (04): : 39 - 56Chu, Yingchi论文数: 0 引用数: 0 h-index: 0机构: Murdoch Univ, Media & Commun, Murdoch, WA, Australia Murdoch Univ, Media & Commun, Murdoch, WA, Australia
- [9] The outbreak of COVID-19 in ChinaINTERNIST, 2020, 61 (08): : 776 - 781Buder, F.论文数: 0 引用数: 0 h-index: 0机构: Univ Klinikum Regensburg, Abt Krankenhaushyg & Infektiol, Franz Josef Strauss Allee 11, D-93053 Regensburg, Germany Univ Klinikum Regensburg, Abt Krankenhaushyg & Infektiol, Franz Josef Strauss Allee 11, D-93053 Regensburg, GermanyHitzenbichler, F.论文数: 0 引用数: 0 h-index: 0机构: Univ Klinikum Regensburg, Abt Krankenhaushyg & Infektiol, Franz Josef Strauss Allee 11, D-93053 Regensburg, Germany Univ Klinikum Regensburg, Abt Krankenhaushyg & Infektiol, Franz Josef Strauss Allee 11, D-93053 Regensburg, GermanyEhrenstein, B.论文数: 0 引用数: 0 h-index: 0机构: Fachklinikum Bad Abbach, Klin & Poliklin Rheumatol & Klin Immunol, Bad Abbach, Germany Univ Klinikum Regensburg, Abt Krankenhaushyg & Infektiol, Franz Josef Strauss Allee 11, D-93053 Regensburg, GermanySalzberger, B.论文数: 0 引用数: 0 h-index: 0机构: Univ Klinikum Regensburg, Abt Krankenhaushyg & Infektiol, Franz Josef Strauss Allee 11, D-93053 Regensburg, Germany Univ Klinikum Regensburg, Abt Krankenhaushyg & Infektiol, Franz Josef Strauss Allee 11, D-93053 Regensburg, Germany
- [10] Acceptance of COVID-19 Vaccination during the COVID-19 Pandemic in ChinaVACCINES, 2020, 8 (03) : 1 - 14Wang, Jiahao论文数: 0 引用数: 0 h-index: 0机构: Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R China Peking Univ, China Ctr Hlth Dev Studies, Beijing 100083, Peoples R China Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R ChinaJing, Rize论文数: 0 引用数: 0 h-index: 0机构: Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R China Peking Univ, China Ctr Hlth Dev Studies, Beijing 100083, Peoples R China Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R ChinaLai, Xiaozhen论文数: 0 引用数: 0 h-index: 0机构: Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R China Peking Univ, China Ctr Hlth Dev Studies, Beijing 100083, Peoples R China Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R ChinaZhang, Haijun论文数: 0 引用数: 0 h-index: 0机构: Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R China Peking Univ, China Ctr Hlth Dev Studies, Beijing 100083, Peoples R China Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R ChinaLyu, Yun论文数: 0 引用数: 0 h-index: 0机构: Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R China Peking Univ, China Ctr Hlth Dev Studies, Beijing 100083, Peoples R China Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R ChinaKnoll, Maria Deloria论文数: 0 引用数: 0 h-index: 0机构: Johns Hopkins Univ, Int Vaccine Access Ctr, Bloomberg Sch Publ Hlth, Baltimore, MD 21205 USA Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R ChinaFang, Hai论文数: 0 引用数: 0 h-index: 0机构: Peking Univ, China Ctr Hlth Dev Studies, Beijing 100083, Peoples R China Peking Univ Hlth Sci Ctr Chinese Ctr Dis Control, Beijing 100083, Peoples R China Natl Hlth Commiss Peoples Republ China, Key Lab Reprod Hlth, Beijing 100083, Peoples R China Peking Univ, Sch Publ Hlth, Beijing 100083, Peoples R China