Calsavara, Vinicius F Long-term frailty modeling using a non-proportional hazards model: Application with a melanoma dataset. [electronic resource] - Statistical methods in medical research Aug 2020 - 2100-2118 p. digital Publication Type: Journal Article ISSN: 1477-0334 Standard No.: 10.1177/0962280219883905 doi Subjects--Topical Terms: BrazilFrailtyHumansLikelihood FunctionsMelanomaModels, StatisticalProportional Hazards ModelsSurvival Analysis