[1] WHO HQ, Dept Maternal Newborn Child & Adolescent Hlth & A, Ageing & Hlth Unit, Geneva, Switzerland
[2] WHO, Social Determinants Hlth, Demog Change & Hlth Aging Unit, Geneva, Switzerland
[3] Nottingham Univ Hosp NHS Trust, Fac Med & Hlth Sci, Nottingham, England
[4] Minist Hlth, Div Geriatr Med, Nairobi, Kenya
[5] Dept Econ & Social Affairs United Nations, Populat Div, Demog Anal Sect, New York, NY USA
[6] United Nations Populat Fund, Tech Div, Populat & Dev Branch, New York, NY USA
[7] Int Telecommun Union ITU, ICT Data & Analyt Div, Geneva, Switzerland
[8] Int Labor Org, Dept Stat, Geneva, Switzerland
[9] Off United Nations High Commissioner Human Rights, Econ Social & Cultural Rights Sect, Geneva, Switzerland
[10] Org Econ Cooperat & Dev, Directorate Employment Labour & Social Affairs, Paris, France
[11] WHO HQ, Dept Maternal Newborn Child & Adolescent Hlth & A, Epidemiol Monitoring & Evaluat Unit, Geneva, Switzerland