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Chen WH, Winokur PL, Edwards KM, Jackson LA, Wald A, Walter EB, Noah DL, Wolff M, Kotloff KL; Pandemic H1N1 Vaccine Adult Study Group.Chen WH, et al. Among authors: edwards km.Vaccine. 2012 Jun 13;30(28):4240-8. doi: 10.1016/j.vaccine.2012.04.044. Epub 2012 Apr 23.Vaccine. 2012.PMID: 22537984Free PMC article.Clinical Trial.