Valdez H, Mitsuyasu R, Landay A, Sevin AD, Chan ES, Spritzler J, Kalams SA, Pollard RB, Fahey J, Fox L, Namkung A, Estep S, Moss R, Sahner D, Lederman MM. Interleukin-2 Increases CD4+ lymphocyte numbers but does not enhance responses to immunization: results of A5046s. J Infect Dis. 2003 Jan 15; 187(2):320-5.