National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA. Electronic address: firstname.lastname@example.org. Hospital General Universitario Gregorio Maranon, Servicio de Immunologia Clinica, Madrid, Spain. Henry Ford Hospital, Division of Infectious Diseases, Detroit, MI, USA. Medical Research Council Clinical Trials Unit, University College London, London, UK. Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN, USA. Center for Biologics Evaluation and Research, US Food and Drug Administration, Silver Spring, MD, USA. Veteran Affairs Medical Center, Washington, DC, USA. UT Southwestern Medical Center, Dallas, TX, USA. The Kirby Institute, University of New South Wales Australia, Sydney, NSW, Australia. Montefiore Medical Center, Bronx, NY, USA. Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand; The HIV Netherlands Australia Thailand Research Collaboration, Thai Red Cross AIDS Research Centre, Bangkok, Thailand. Mayo Clinic Hospital, Saint Marys Campus, Rochester, MN, USA. CHIP Centre of Excellence for Health, Immunity, and Infections, Department of Infectious Diseases, Rigshospitalet, Copenhagen, Denmark. National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA.