Late assessment of local control by PET in patients with distal rectal cancer managed non-operatively after complete tumor regression following neoadjunvant chemoradiation - Habr Gama, Angelita; Gama Rodrigues, Joaquim José; Perez, R. O.; Proscurshim, I.; Julião, G. P. São; Kruglensky, D.; Kiss, D.; Cecconnello, Ivan; Buchpiguel, Carlos Alberto (Tecniques in coloproctology, 2008)