TY - JOUR DP - http://iris.who.int/ DB - WHO IRIS EP - 384 AU - World Health Organization LA - es UR - https://iris.who.int/handle/10665/241225 JF - Weekly Epidemiological Record = Relevé épidémiologique hebdomadaire DA - 2008 PY - 2008 IS - 42 SP - 373 TI - 23-valent pneumococcal polysaccharide vaccine : WHO position paper VL - 83 ER -