?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Godolphin&rft.aufirst=PJ&rft.au=Godolphin%2C+PJ&rft.date=1+March+2019&rft.issn=1477-0334&rft.atitle=Robustness+of+crossover+trials+against+subject+drop-out+-+Examples+of+perpetually+connected+designs&rft.title=Statistical+Methods+in+Medical+Research&rft.issue=3&rft.volume=28&rft.pages=788-800&rft.genre=article