Helper T Cell Epitope-Mapping Reveals MHC-Peptide Binding Affinities That Correlate with T Helper Cell Responses to Pneumococcal Surface Protein A. - Singh, Rajesh; Singh, Shailesh; Sharma, Praveen K.; Singh, Udai P.; Briles, David E.; Hollingshead, Susan K.; Lillard Jr., James W. (PLoS ONE, 2010)