title: Time to progression ratio: promising new metric or just another metric?
authors.affiliation: Department of Mathematics and Statistics, Vassar College, Poughkeepsie, NY, USA.
authors.forename: Ming-Wen
authors.initials: MW
authors.lastname: An
authors.affiliation: Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA.
authors.forename: Sumithra J
authors.initials: SJ
authors.lastname: Mandrekar