Fernandes, Gustavo dos Santos, et al. “ Downstaging of a Rectal Gastrointestinal Stromal Tumor by Neoadjuvant Imatinib Therapy Allowing for a Conservative Surgical Approach ”.
Clinics, vol. 64, no. 8, Jan. 2009, pp. 819-21,
https://doi.org/10.1590/S1807-59322009000800018.