M Aira, P Mantyselka, A Vehvilainen and E. Kumpusalo
Occupational Medicine 60 ( 6 ): 430 - 435 , 2010
P Mantyselka, M Aira, A Vehvilainen and E. Kumpusalo
Occupational Medicine 60 ( 6 ): 491 - 493 , 2010