Change in risk factors for coronary heart disease during 10 years of a community intervention programme (North Karelia project) - Puska, P; Salonen, J T; Nissinen, A; Tuomilehto, J; Vartiainen, E; Korhonen, H; Tanskanen, A; Rönnqvist, P; Koskela, K; Huttunen, J (BMJ, 1983)