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- [31] Changes in stillbirths and child and youth mortality in 2020 and 2021 during the COVID-19 pandemicINTERNATIONAL JOURNAL OF EPIDEMIOLOGY, 2024, 53 (03)Acosta, Enrique论文数: 0 引用数: 0 h-index: 0机构: Ctr Estudis Demog CED, Barcelona, Spain Max Planck Inst Demog Res MPIDR, Lab Populat Hlth, Rostock, Germany Univ Autonoma Barcelona, Ctr Estudis Demograf CED, Carrer Ca Altayo,Edif E2, Bellaterra 08193, Spain Ctr Estudis Demog CED, Barcelona, SpainHug, Lucia论文数: 0 引用数: 0 h-index: 0机构: UNICEF, Div Data Analyt Planning & Monitoring, New York, NY USA Ctr Estudis Demog CED, Barcelona, SpainCruz-Castanheira, Helena论文数: 0 引用数: 0 h-index: 0机构: CELADE Populat Div ECLAC, Santiago, Chile Ctr Estudis Demog CED, Barcelona, SpainSharrow, David论文数: 0 引用数: 0 h-index: 0机构: UNICEF, Div Data Analyt Planning & Monitoring, New York, NY USA Ctr Estudis Demog CED, Barcelona, Spainda Silva, Jose Henrique Monteiro论文数: 0 引用数: 0 h-index: 0机构: Univ Penn, Populat Studies Ctr, Philadelphia, PA USA Ctr Estudis Demog CED, Barcelona, SpainYou, Danzhen论文数: 0 引用数: 0 h-index: 0机构: UNICEF, Div Data Analyt Planning & Monitoring, New York, NY USA Ctr Estudis Demog CED, Barcelona, Spain
- [32] Excess deaths in people with cardiovascular diseases during the COVID-19 pandemicEUROPEAN JOURNAL OF PREVENTIVE CARDIOLOGY, 2021, 28 (14) : 1599 - 1608Banerjee, Amitava论文数: 0 引用数: 0 h-index: 0机构: UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England Hlth Data Res UK, Gibbs Bldg,215 Euston Rd, London NW1 2BE, England Barts Hlth NHS Trust, Dept Cardiol, Royal London Hosp, Whitechapel Rd, London E1 1BB, England Univ Coll London Hosp NHS Trust, 235 Euston Rd, London NW1 2BU, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandChen, Suliang论文数: 0 引用数: 0 h-index: 0机构: UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England Hlth Data Res UK, Gibbs Bldg,215 Euston Rd, London NW1 2BE, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandPasea, Laura论文数: 0 引用数: 0 h-index: 0机构: UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England Hlth Data Res UK, Gibbs Bldg,215 Euston Rd, London NW1 2BE, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandLai, Alvina G.论文数: 0 引用数: 0 h-index: 0机构: UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England Hlth Data Res UK, Gibbs Bldg,215 Euston Rd, London NW1 2BE, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandKatsoulis, Michail论文数: 0 引用数: 0 h-index: 0机构: UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England Hlth Data Res UK, Gibbs Bldg,215 Euston Rd, London NW1 2BE, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandDenaxas, Spiros论文数: 0 引用数: 0 h-index: 0机构: UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England Hlth Data Res UK, Gibbs Bldg,215 Euston Rd, London NW1 2BE, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandNafilyan, Vahe论文数: 0 引用数: 0 h-index: 0机构: Off Natl Stat, 1 Drummond Gate, London SW1V 2QQ, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandWilliams, Bryan论文数: 0 引用数: 0 h-index: 0机构: Univ Coll London Hosp NHS Trust, 235 Euston Rd, London NW1 2BU, England UCL, Inst Cardiovasc Sci, London WC1E 6BT, England UCL, Hosp NIHR Biomed Res Ctr, Maple House,1st Floor,149 Tottenham Court Rd, London W1T 7DN, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandWong, Wai Keong论文数: 0 引用数: 0 h-index: 0机构: UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England Univ Coll London Hosp NHS Trust, 235 Euston Rd, London NW1 2BU, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandBakhai, Ameet论文数: 0 引用数: 0 h-index: 0机构: Royal Free Hosp, Dept Cardiol, Pond St, London NW3 2QG, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England论文数: 引用数: h-index:机构:Pillay, Deenan论文数: 0 引用数: 0 h-index: 0机构: UCL, Div Infect & Immun, UCL Cruciform Bldg,Gower St, London WC1E 6BT, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandNoursadeghi, Mahdad论文数: 0 引用数: 0 h-index: 0机构: Univ Coll London Hosp NHS Trust, 235 Euston Rd, London NW1 2BU, England UCL, Div Infect & Immun, UCL Cruciform Bldg,Gower St, London WC1E 6BT, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandWu, Honghan论文数: 0 引用数: 0 h-index: 0机构: UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England Hlth Data Res UK, Gibbs Bldg,215 Euston Rd, London NW1 2BE, England Najing Univ Informat Sci & Technol, Sch Comp & Software, Ningliu Rd, Nanjing 210044, Jiangsu, Peoples R China UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandPareek, Nilesh论文数: 0 引用数: 0 h-index: 0机构: Kings Coll Hosp NHS Fdn Trust, Denmark Hill, London SE5 9RS, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandBromage, Daniel论文数: 0 引用数: 0 h-index: 0机构: Kings Coll Hosp NHS Fdn Trust, Denmark Hill, London SE5 9RS, England Kings Coll London, Sch Cardiovasc Med & Sci, British Heart Fdn Ctr, London WC2R 2LS, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandMcDonagh, Theresa A.论文数: 0 引用数: 0 h-index: 0机构: Kings Coll Hosp NHS Fdn Trust, Denmark Hill, London SE5 9RS, England Kings Coll London, Sch Cardiovasc Med & Sci, British Heart Fdn Ctr, London WC2R 2LS, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandByrne, Jonathan论文数: 0 引用数: 0 h-index: 0机构: Kings Coll Hosp NHS Fdn Trust, Denmark Hill, London SE5 9RS, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandTeo, James T. H.论文数: 0 引用数: 0 h-index: 0机构: Kings Coll Hosp NHS Fdn Trust, Denmark Hill, London SE5 9RS, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandShah, Ajay M.论文数: 0 引用数: 0 h-index: 0机构: Kings Coll Hosp NHS Fdn Trust, Denmark Hill, London SE5 9RS, England Kings Coll London, Sch Cardiovasc Med & Sci, British Heart Fdn Ctr, London WC2R 2LS, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandHumberstone, Ben论文数: 0 引用数: 0 h-index: 0机构: Off Natl Stat, 1 Drummond Gate, London SW1V 2QQ, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandTang, Liang, V论文数: 0 引用数: 0 h-index: 0机构: Huazhong Univ Sci & Technol, Union Hosp, Tongji Med Coll, Inst Hematol, Wuhan 430022, Peoples R China UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandShah, Anoop S., V论文数: 0 引用数: 0 h-index: 0机构: Univ Edinburgh, Ctr Cardiovasc Sci, Queens Med Res Inst, 47 Little France Crescent, Edinburgh EH16 4TJ, Midlothian, Scotland UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandRubboli, Andrea论文数: 0 引用数: 0 h-index: 0机构: Osped S Maria Croci, Div Cardiol, Viale Randi 5, I-48121 Ravenna, Italy UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandGuo, Yutao论文数: 0 引用数: 0 h-index: 0机构: Peoples Liberat Army Gen Hosp, 28 Fuxing Rd, Beijing, Peoples R China UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandHu, Yu论文数: 0 引用数: 0 h-index: 0机构: Huazhong Univ Sci & Technol, Union Hosp, Tongji Med Coll, Inst Hematol, Wuhan 430022, Peoples R China UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, EnglandSudlow, Cathie L. M.论文数: 0 引用数: 0 h-index: 0机构: Hlth Data Res UK, Gibbs Bldg,215 Euston Rd, London NW1 2BE, England Univ Edinburgh, Ctr Med Informat, Usher Inst, 9 Little France Rd, Edinburgh EH16 4UX, Midlothian, Scotland BHF Data Sci Ctr, Hlth Data Res, 215 Euston Rd, London NW1 2BE, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England论文数: 引用数: h-index:机构:Hemingway, Harry论文数: 0 引用数: 0 h-index: 0机构: UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England Hlth Data Res UK, Gibbs Bldg,215 Euston Rd, London NW1 2BE, England UCL, Inst Hlth Informat, 222 Euston Rd, London NW1 1DA, England
- [33] Overdose deaths before and during the COVID-19 pandemic in a US countyFRONTIERS IN PUBLIC HEALTH, 2024, 12Brown, C. Hendricks论文数: 0 引用数: 0 h-index: 0机构: Northwestern Univ, Feinberg Sch Med, Dept Psychiat & Behav Sci, Chicago, IL 60208 USA Northwestern Univ, Feinberg Sch Med, Dept Psychiat & Behav Sci, Chicago, IL 60208 USAJohnson, Kimberly A.论文数: 0 引用数: 0 h-index: 0机构: Univ S Florida, Coll Behav & Community Sci, Dept Mental Hlth Law & Policy MHC 2636, Tampa, FL USA Northwestern Univ, Feinberg Sch Med, Dept Psychiat & Behav Sci, Chicago, IL 60208 USAHills, Holly A.论文数: 0 引用数: 0 h-index: 0机构: Univ S Florida, Coll Behav & Community Sci, Dept Mental Hlth Law & Policy MHC 2636, Tampa, FL USA Northwestern Univ, Feinberg Sch Med, Dept Psychiat & Behav Sci, Chicago, IL 60208 USA论文数: 引用数: h-index:机构:Clarke, Dianne L.论文数: 0 引用数: 0 h-index: 0机构: Operat PAR Inc, Pinellas Pk, FL USA Northwestern Univ, Feinberg Sch Med, Dept Psychiat & Behav Sci, Chicago, IL 60208 USABarnett, Joshua T.论文数: 0 引用数: 0 h-index: 0机构: Pinellas Cty Govt, Dept Human Serv, Clearwater, FL USA Northwestern Univ, Feinberg Sch Med, Dept Psychiat & Behav Sci, Chicago, IL 60208 USANewman, Reta T.论文数: 0 引用数: 0 h-index: 0机构: Dist Six Med Examiner Off, Pinellas Cty Forens Lab, Largo, FL USA Northwestern Univ, Feinberg Sch Med, Dept Psychiat & Behav Sci, Chicago, IL 60208 USABurns, Tim L.论文数: 0 引用数: 0 h-index: 0机构: Pinellas Cty Govt, Dept Human Serv, Clearwater, FL USA Northwestern Univ, Feinberg Sch Med, Dept Psychiat & Behav Sci, Chicago, IL 60208 USAPellan, William A.论文数: 0 引用数: 0 h-index: 0机构: Dist Six Med Examiner Off, Largo, FL USA Northwestern Univ, Feinberg Sch Med, Dept Psychiat & Behav Sci, Chicago, IL 60208 USA
- [34] Effect of the COVID-19 Pandemic on Stillbirths in Canada and the United StatesJOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA, 2024, 46 (04)Joseph, K. S.论文数: 0 引用数: 0 h-index: 0机构: Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, Canada Childrens & Womens Hosp & Hlth Ctr British Columb, Vancouver, BC, Canada Univ British Columbia, Sch Populat & Publ Hlth, Vancouver, BC, Canada Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, CanadaLisonkova, Sarka论文数: 0 引用数: 0 h-index: 0机构: Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, Canada Childrens & Womens Hosp & Hlth Ctr British Columb, Vancouver, BC, Canada Univ British Columbia, Sch Populat & Publ Hlth, Vancouver, BC, Canada Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, CanadaSimon, Sophie论文数: 0 引用数: 0 h-index: 0机构: Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, Canada Childrens & Womens Hosp & Hlth Ctr British Columb, Vancouver, BC, Canada Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, CanadaJohn, Sid论文数: 0 引用数: 0 h-index: 0机构: Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, Canada Childrens & Womens Hosp & Hlth Ctr British Columb, Vancouver, BC, Canada Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, CanadaRazaz, Neda论文数: 0 引用数: 0 h-index: 0机构: Karolinska Inst, Dept Med Solna, Stockholm, Sweden Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, CanadaMuraca, Giulia M.论文数: 0 引用数: 0 h-index: 0机构: McMaster Univ, Dept Obstet & Gynecol, Hamilton, ON, Canada McMaster Univ, Dept Hlth Res Methods Evidence & Impact, Hamilton, ON, Canada Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, CanadaBoutin, Amelie论文数: 0 引用数: 0 h-index: 0机构: Univ Laval, Dept Pediat, Fac Med, Quebec City, PQ, Canada Univ Laval, Res Ctr, CHU Quebec, Quebec City, PQ, Canada Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, CanadaBedaiwy, Mohamed A.论文数: 0 引用数: 0 h-index: 0机构: Childrens & Womens Hosp & Hlth Ctr British Columb, Vancouver, BC, Canada Univ British Columbia, Dept Obstet & Gynaecol, Div Reprod Endocrinol & Infertil, Vancouver, BC, Canada Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, CanadaBrandt, Justin S.论文数: 0 引用数: 0 h-index: 0机构: NYU, Dept Obstet & Gynecol, Grossman Sch Med, Div Maternal Fetal Med, New York, NY 10016 USA Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, CanadaAnanth, Cande, V论文数: 0 引用数: 0 h-index: 0机构: Rutgers Robert Wood Johnson Med Sch, Dept Obstet Gynecol & Reprod Sci, Div Epidemiol & Biostat, New Brunswick, NJ USA Rutgers Robert Wood Johnson Med Sch, Cardiovasc Inst New Jersey, New Brunswick, NJ USA Rutgers Robert Wood Johnson Med Sch, Dept Med, New Brunswick, NJ USA Rutgers Robert Wood Johnson Med Sch, Dept Biostat & Epidemiol, New Brunswick, NJ USA Rutgers Robert Wood Johnson Med Sch, Environm & Occupat Hlth Sci Inst, New Brunswick, NJ USA Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, Canada
- [35] Excess of deaths during COVID-19 pandemic in Mato Grosso, BrazilCIENCIA & SAUDE COLETIVA, 2023, 28 (12): : 3599 - 3608de Oliveira, Ligia Regina论文数: 0 引用数: 0 h-index: 0机构: Univ Fed Mato Grosso, Inst Saude Colet, Campus Cuiaba,Av Edgar Vieira, BR-78060900 Cuiaba, MT, Brazil Univ Fed Mato Grosso, Inst Saude Colet, Campus Cuiaba,Av Edgar Vieira, BR-78060900 Cuiaba, MT, BrazilMuraro, Ana Paula论文数: 0 引用数: 0 h-index: 0机构: Univ Fed Mato Grosso, Inst Saude Colet, Campus Cuiaba,Av Edgar Vieira, BR-78060900 Cuiaba, MT, Brazil Univ Fed Mato Grosso, Inst Saude Colet, Campus Cuiaba,Av Edgar Vieira, BR-78060900 Cuiaba, MT, BrazilCecconello, Moiseis dos Santos论文数: 0 引用数: 0 h-index: 0机构: Univ Fed Mato Grosso, Dept Matemat, Campus Cuiaba, Cuiaba, MT, Brazil Univ Fed Mato Grosso, Inst Saude Colet, Campus Cuiaba,Av Edgar Vieira, BR-78060900 Cuiaba, MT, BrazilLalucci, Mauro Citro论文数: 0 引用数: 0 h-index: 0机构: Univ Fed Mato Grosso, Campus Cuiaba, Cuiaba, MT, Brazil Univ Fed Mato Grosso, Inst Saude Colet, Campus Cuiaba,Av Edgar Vieira, BR-78060900 Cuiaba, MT, BrazilAndrade, Amanda Cristina de Souza论文数: 0 引用数: 0 h-index: 0机构: Univ Fed Mato Grosso, Inst Saude Colet, Campus Cuiaba,Av Edgar Vieira, BR-78060900 Cuiaba, MT, Brazil Univ Fed Mato Grosso, Inst Saude Colet, Campus Cuiaba,Av Edgar Vieira, BR-78060900 Cuiaba, MT, Brazil
- [36] Alcohol-Related Deaths Surged During the COVID-19 PandemicAMERICAN JOURNAL OF NURSING, 2024, 124 (06) : 11 - 11Roush, Karen论文数: 0 引用数: 0 h-index: 0
- [37] Analysis of Excess Deaths During the COVID-19 Pandemic in the State of FloridaAMERICAN JOURNAL OF PUBLIC HEALTH, 2021, 111 (04) : 704 - 707Tatar, Moosa论文数: 0 引用数: 0 h-index: 0机构: Univ Utah, Matheson Ctr Hlth Care Studies, Salt Lake City, UT 84108 USA Univ Utah, Dept Populat Hlth Sci, Salt Lake City, UT 84108 USA Univ Utah, Matheson Ctr Hlth Care Studies, Salt Lake City, UT 84108 USAHabibdoust, Amir论文数: 0 引用数: 0 h-index: 0机构: Univ Guilan, Dept Econ & Accounting, Rasht, Iran Univ Utah, Matheson Ctr Hlth Care Studies, Salt Lake City, UT 84108 USAWilson, Fernando A.论文数: 0 引用数: 0 h-index: 0机构: Univ Utah, Matheson Ctr Hlth Care Studies, Salt Lake City, UT 84108 USA Univ Utah, Dept Populat Hlth Sci, Salt Lake City, UT 84108 USA Univ Utah, Matheson Ctr Hlth Care Studies, Salt Lake City, UT 84108 USA
- [38] Excess Deaths in Malatya in the COVID-19 PandemicTURKISH THORACIC JOURNAL, 2021, 22 (06): : 473 - 476Aytemur, Zeynep Ayfer论文数: 0 引用数: 0 h-index: 0机构: Inonu Univ, Fac Med, Dept Kilmonol, Malatya, Turkey Inonu Univ, Fac Med, Dept Kilmonol, Malatya, TurkeyYalcinsoy, Murat论文数: 0 引用数: 0 h-index: 0机构: Inonu Univ, Fac Med, Dept Kilmonol, Malatya, Turkey Inonu Univ, Fac Med, Dept Kilmonol, Malatya, TurkeyArslan, Ahmet Kadir论文数: 0 引用数: 0 h-index: 0机构: Inonu Univ, Fac Med, Dept Biostat & Med Informat, Malatya, Turkey Inonu Univ, Fac Med, Dept Kilmonol, Malatya, TurkeyHacievliyagil, Suleyman Savas论文数: 0 引用数: 0 h-index: 0机构: Inonu Univ, Fac Med, Dept Kilmonol, Malatya, Turkey Inonu Univ, Fac Med, Dept Kilmonol, Malatya, Turkey
- [39] Increased Cardiovascular Mortality in Ecuador during COVID-19 PandemicANNALS OF GLOBAL HEALTH, 2023, 89 (01): : 1 - 4Fornasini, Marco论文数: 0 引用数: 0 h-index: 0机构: Univ Int Ecuador UIDE, Fac Ciencias Salud & Vida, Av Jorge Fernandez S-N,Edificio Principal,3 Er Pis, Quito, Ecuador Univ Int Ecuador UIDE, Fac Ciencias Salud & Vida, Quito, Ecuador Univ Int Ecuador UIDE, Fac Ciencias Salud & Vida, Av Jorge Fernandez S-N,Edificio Principal,3 Er Pis, Quito, Ecuador论文数: 引用数: h-index:机构:Baldeon, Manuel E.论文数: 0 引用数: 0 h-index: 0机构: Univ Int Ecuador UIDE, Fac Ciencias Salud & Vida, Quito, Ecuador Univ Int Ecuador UIDE, Fac Ciencias Salud & Vida, Av Jorge Fernandez S-N,Edificio Principal,3 Er Pis, Quito, Ecuador
- [40] An increased occurrence of viral hepatitis A during the COVID-19 pandemicINFECTIOUS DISEASES, 2021, 53 (12) : 963 - 964Todorova, Tatina论文数: 0 引用数: 0 h-index: 0机构: Med Univ Varna, Dept Microbiol & Virol, 3 Bregalniza St, Varna 9002, Bulgaria Univ Hosp St Marina, Lab Virol, 1 Hristo Smirnenski St, Varna 9010, Bulgaria Med Univ Varna, Dept Microbiol & Virol, 3 Bregalniza St, Varna 9002, BulgariaStoykova, Zhivka论文数: 0 引用数: 0 h-index: 0机构: Med Univ Varna, Dept Microbiol & Virol, 3 Bregalniza St, Varna 9002, Bulgaria Univ Hosp St Marina, Lab Virol, 1 Hristo Smirnenski St, Varna 9010, Bulgaria Med Univ Varna, Dept Microbiol & Virol, 3 Bregalniza St, Varna 9002, BulgariaKostadinova, Tsvetelina论文数: 0 引用数: 0 h-index: 0机构: Med Univ Varna, Dept Microbiol & Virol, 3 Bregalniza St, Varna 9002, Bulgaria Med Univ Varna, Med Coll, Varna, Bulgaria Med Univ Varna, Dept Microbiol & Virol, 3 Bregalniza St, Varna 9002, Bulgaria