[1] Univ N Carolina, Dept Epidemiol, Gillings Sch Global Publ Hlth, Chapel Hill, NC 27599 USA
[2] Univ N Carolina, Dept Biostat, Gillings Sch Global Publ Hlth, Chapel Hill, NC 27599 USA
[3] Univ Illinois, Chicago, IL USA
[4] Univ Insubria, Dipartimento Sci Clin & Biol, Varese, Italy
[5] Vrije Univ Amsterdam, Med Ctr, Amsterdam, Netherlands
[6] UNIM Project, Kisumu, Kenya
[7] Univ Nairobi, Nairobi, Kenya
[8] Univ Manitoba, Winnipeg, MB R3T 2N2, Canada