aSchool of Medicine
bUNC Gillings School of Global Public Health, The University of North Carolina, Chapel Hill, North Carolina, USA.
Correspondence to Adaora A. Adimora, MD, MPH, Division of Infectious Diseases, 130 Mason Farm Rd, CB #7030, UNC School of Medicine, Chapel Hill, NC 27599-7030, USA. Tel: +1 919 966 2536; e-mail: firstname.lastname@example.org
Received 5 December, 2013
Revised 22 January, 2014
Accepted 23 January, 2014