TY - JOUR A1 - Mäkinen, T.M. A1 - Juvonen, R. A1 - Jokelainen, J. A1 - Harju, T.H. A1 - Peitso, A. A1 - Bloigu, A. A1 - Silvennoinen-Kassinen, S. A1 - Leinonen, M. A1 - Hassi, J. T1 - Cold temperature and low humidity are associated with increased occurrence of respiratory tract infections Y1 - 2009 DO - 10.1016/j.rmed.2008.09.011 JF - Respiratory Medicine VL - 103 IS - 3 ER -