Parity and risk of hip fracture in postmenopausal women.
Kauppi
M
M
Division of Welfare and Health Promotion, National Institute for Health and Welfare, Peltolantie 3, 20720 Turku, Finland. maarit.kauppi@thl.fi
Heliövaara
M
M
Impivaara
O
O
Knekt
P
P
Jula
A
A