Effect of Physical Exercise on In Vitro Production of Interleukin 1, Interleukin 6, Tumour Necrosis Factor-α, Interleukin 2 and Interferon-γ - Haahr, P M; Pedersen, B K; Fomsgaard, A; Tvede, N; Diamant, M; Klarlund, K; Halkjœr-Kristensen, J; Bendtzen, K (International Journal of Sports Medicine, 1991)