Alteration of interleukin-2 (IL-2) and soluble IL-2 receptor secretion in the sera and urine of patients with rickettsial boutonneuse fever - Mansueto, S; D’Ancona, FP; Colletti, P; Graceffa, R; La Seta, F; Pecoraro, V; Gambino, G; Grillo, G; Vitale, G; Richiusa, P; D’Agostino, P; Cillari, E (J Infect Dis, 1997)