Kimball AB, Rothman KJ, Kricorian G, Pariser D, Yamauchi PS, Menter A, Teller CF, Aras G, Accortt NA, Hooper M, Rice KC, Gelfand JM. OBSERVE-5: observational postmarketing safety surveillance registry of etanercept for the treatment of psoriasis final 5-year results. J Am Acad Dermatol. 2015 Jan;72(1):115-22. doi: 10.1016/j.jaad.2014.08.050
Christiansen CF, Pedersen L, Sorensen HT, Rothman KJ. Methods to assess seasonal effects in epidemiological studies of infectious diseases-exemplified by application to the occurrence of meningococcal disease. Clin Microbiol Infect. 2012 Oct 1;18(10):963-9.