Cyclooxygenase-2 (COX-2) expression in lymphoma in north-west of Iran - Sanaat, Zohreh; Tavangar, Seyed-Mohammad; Gharamaleki, Jalil Vaez; Kermani, Iraj Aswadi; Ziae, Jamal Eivazi; Nikanfar, Alireza; Esfahani, Ali; Chavoshi, Seyyed Hadi; Bevrani, H; Akbari, Farideh (International Journal of Hematology-Oncology and Stem Cell Research)