TY - JOUR DP - http://iris.who.int/ DB - WHO IRIS AU - Litvak, Jorge AU - Maggi, S UR - https://iris.who.int/handle/10665/46862 JF - Infectious disease clinics of North America 1991 ; 5(2) : 353-363 DA - 1991 PY - 1991 TI - Aging / J. Litvak, S. Maggi KW - Aging ER -