title: Cardiac rehabilitation: how much pain for the optimal gain?
authors: Sport Medicine Department, Isala Clinics Zwolle, PO Box 10500, 8000 GM, Zwolle, the Netherlands, j.a.snoek@isala.nl.
authors: J A
authors: JA
authors: Snoek
authors: M J M
authors: MJ
authors: Cramer
authors: F J G
authors: FJ
authors: Backx