Usability testing of ANSWER: a web-based methotrexate decision aid for patients with rheumatoid arthritis. - Linda C. Li; Paul M. Adam; Anne F. Townsend; Diane Lacaille; Charlene Yousefi; Dawn Stacey; Diane Gromala; Chris D. Shaw; Peter Tugwell; Catherine L. Backman (BMC Medical Informatics Decis. Mak., 2013)