Probability of first CR according to the type of onset (insidious or acute). Kaplan-Meier curves show that remissions continued to occur with or without treatment with low-dose steroids between 6 months and 3 years and that remissions occurred earlier and at higher rates in patients with an acute onset of symptoms as opposed to those with an insidious onset. Splenectomized patients were censored at the time of splenectomy. © Ferrata Storti Foundation, Italy. Obtained and reprinted from Sailer et al⁶  with permission.