TY - JOUR DP - http://iris.who.int/ DB - WHO IRIS EP - 64 AU - World Health Organization LA - en LA - fr UR - https://iris.who.int/handle/10665/228287 JF - Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire DA - 1992 PY - 1992 IS - 09 SP - 57 TI - Weekly Epidemiological Record, 1992, vol. 67, 09 [full issue] VL - 67 ER -