Risk factors for disease severity among hospitalised patients with 2009 pandemic influenza A (H1N1) in Spain, April - December 2009.
Santa-Olalla Peralta
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P
Ministerio de Sanidad y Política Social (Ministry of Health and Social Policy), Madrid, Spain. psantaolalla@msps.es
Cortes-García
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M
Vicente-Herrero
M
M
Castrillo-Villamandos
C
C
Arias-Bohigas
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P
Pachon-del Amo
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I
Sierra-Moros
M J
MJ