[1] Univ Airlangga, Fac Med, Study Program Pulmonol & Resp Med, Surabaya, Indonesia
[2] Univ Airlangga, Dr Soetomo Gen Acad Hosp, Fac Med, Dept Pulmonol & Resp Med, Surabaya, Indonesia
[3] Univ Airlangga, Dr Soetomo Gen Acad Hosp, Fac Med, Dept Pulmonol & Resp Med, Jl Mayjend Prof Dr Moestopo 6-8, Surabaya 60286, East Java, Indonesia