doi.org/10.1016/S0140-6736(03)13772-5, hdl.handle.net/1765/59390
The Lancet
Department of Pediatrics

Veenhoven, R., Bogaert, D., Uiterwaal, C., Brouwer, C., Kiezebrink, H., Bruin, J., IJzerman, E., Hermans, P., de Groot, R., Zegers, B., Kuis, W., Rijkers, G. T., Schilder, A.& Sanders, E. (2003). Effect of conjugate pneumococcal vaccine followed by polysaccharide pneumococcal vaccine on recurrent acute otitis media: A randomised study. The Lancet, 361(9376), 2189–2195.https://doi.org/10.1016/S0140-6736(03)13772-5