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Dyfyniad Arddull ChicagoCook, Johanna, J. R. J. Richardson, and Andrew Street. Cost Utility Analysis of Treatment for Gallstone Disease: Interim Results. Fairfield, Vic.: National Centre for Health Program Evaluation, 1993.
Dyfyniad MLACook, Johanna, et al. Cost Utility Analysis of Treatment for Gallstone Disease: Interim Results. National Centre for Health Program Evaluation, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.