Pre-post feasibility trial of a telephone-delivered exercise intervention for patients during chemotherapy for recurrent ovarian cancer: the ECHO-R trial protocol oleh Andreas Obermair, Monika Janda, Sandra C Hayes, Elizabeth Eakin, Marcelo Nascimento, Dimitrios Vagenas, Jermaine Coward, Louisa G Gordon, Catherine Shannon, James Nicklin, Jeffrey Goh, Vanessa L Beesley, Penny Webb, Merran Williams, Sheree Rye, Rosalind R Spence, Helene O’Neill, Melissa J Newton, Sara Baniahmadi, Andrea Garret