?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Walburn&rft.aufirst=J&rft.au=Walburn%2C+J&rft.atitle=An+investigation+of+the+predictors+of+photoprotection+and+UVR+dose+to+the+face+in+patients+with+XP%3A+a+protocol+using+observational+mixed+methods&rft.volume=7&rft.title=BMJ+Open&rft.date=1+August+2017&rft.issn=2044-6055&rft.issue=8&rft.genre=article