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Dyfyniad Arddull ChicagoWilson, S., B. Delaney, A. Roalfe, and R. Hobbs. Clinical Trials in Primary Care. Costs of Research Should Not Be Borne by Service Practitioners. 1999.
Dyfyniad MLAWilson, S., et al. Clinical Trials in Primary Care. Costs of Research Should Not Be Borne by Service Practitioners. 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.