  Reviewer \#0: This is an interesting longitudinal study where the qualitative substudy yielded more interesting findings than the main quantitative study. I cannot help but feel the study is underpowered, and I gives some comments on the quantitative analysis that may make it more convincing.  0\. Sample size is based on a \"post-intervention effect size\" of 00%. I don\'t know what this means. A 00% improvement in the baseline QOL score? It is not clear what this effect size is for an ordinal measure like a questionnaire score.  