[1] Swedish Inst Infect Dis Control, Ctr Microbiol Preparedness, SE-17182 Solna, Sweden
[2] Uppsala Univ, Uppsala, Sweden
[3] Shandong Univ, Ctr Hlth Management & Policy, Jinan 250100, Peoples R China
[4] Karolinska Inst, Dept Publ Hlth Sci, Div Int Hlth, Stockholm, Sweden