Trial Protocol BMJ Open. 2015 Sep 22;5(9):e009087. doi: 10.1136/bmjopen-2015-009087

Results JAMA. 2018 Jun 12;319(22):2280-2288. doi: 10.1001/jama.2018.6452.

Qualitative results Trials. 2018 Jun 25;19(1):328. doi: 10.1186/s13063-018-2722-4