Surgical repair of pectus excavatum markedly improves body image and perceived ability for physical activity: multicenter study. - Kelly RE Jr; Cash TF; Shamberger RC; Mitchell KK; Mellins RB; Lawson ML; Oldham K; Azizkhan RG; Hebra AV; Nuss D; Goretsky MJ; Sharp RJ; et al. (Pediatrics, 2008)