Effects of mild physical exercise on serum lipoproteins and metabolites of arachidonic acid: A controlled randomised trial in middle-aged men - Rauramaa, R; Salonen, J T; Kukkonen-Haijula, K; Seppänen, K; Seppälä, E; Vapaatalo, H; Huttunen, J K (BMJ, 1984)