AU - Thune I, Njølstad I, Løchen M TI - Cardiovascular risk factors and physical activity: How much is enough? PT - JOUR DP - 1999 TA - Archives of Internal Medicine pages = {882-883}, VI - 159 IP - 8 AID - [doi] 4100 - http://dx.doi.org/ SO - Archives of Internal Medicine April 26, 1999 159(8):882