Effects of adding aerobic physical activity to strengthening exercise on hip osteoarthritis symptoms: protocol for the PHOENIX randomised controlled trial

Michelle Hall, Kim Allison, Rana S. Hinman, Kim L. Bennell, Libby Spiers, Gabrielle Knox, Melanie Plinsinga, David M. Klyne, Fiona McManus, Karen E. Lamb, Ricardo Da Costa, Nicholas J. Murphy, Fiona L. Dobson