Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleComparing and combining biomarkers as principal surrogates for time-to-event clinical endpoints.AuthorsGabriel, Erin E.; Sachs, Michael C.; Gilbert, Peter B.PublicationStatistics in Medicine, 2017, Vol 36, Issue 21, p3440ISSN0277-6715Publication typejournal articleDOI10.1002/sim.7354