Original report in

• Routine aspirin or nonsteroidal anti-inflammatory drugs for the primary prevention of colorectal cancer: U.S. Preventive Services Task Force recommendation statement.

  U.S. Preventive Services Task Force. U.S. Preventive Services Task Force. Ann Intern Med. 2007 Mar 6;146(5):361-4. Ann Intern Med. 2007. PMID: 17339621
• The use of aspirin for primary prevention of colorectal cancer: a systematic review prepared for the U.S. Preventive Services Task Force.

  Dubé C, Rostom A, Lewin G, Tsertsvadze A, Barrowman N, Code C, Sampson M, Moher D; U.S. Preventive Services Task Force. Dubé C, et al. Ann Intern Med. 2007 Mar 6;146(5):365-75. doi: 10.7326/0003-4819-146-5-200703060-00009. Ann Intern Med. 2007. PMID: 17339622
• Nonsteroidal anti-inflammatory drugs and cyclooxygenase-2 inhibitors for primary prevention of colorectal cancer: a systematic review prepared for the U.S. Preventive Services Task Force.

  Rostom A, Dubé C, Lewin G, Tsertsvadze A, Barrowman N, Code C, Sampson M, Moher D; U.S. Preventive Services Task Force. Rostom A, et al. Ann Intern Med. 2007 Mar 6;146(5):376-89. doi: 10.7326/0003-4819-146-5-200703060-00010. Ann Intern Med. 2007. PMID: 17339623