Pneumococcal vaccine and otitis media.
Mäkelä PH, Sibakov M, Herva E, Henrichsen J, Luotonen J, Timonen M, Leinonen M, Koskela M, Pukander J, Pöntynen S, Grönroos P, Karma P.
Mäkelä PH, et al.
Lancet. 1980 Sep 13;2(8194):547-51. doi: 10.1016/s0140-6736(80)91989-3.
Lancet. 1980.
PMID: 6106735
Clinical Trial.