Berzosertib Active Not Recruiting Phase 2 Trials for Limited Stage Small Cell Lung Carcinoma / Bladder Small Cell Neuroendocrine Carcinoma / Recurrent Small Cell Lung Cancer (SCLC) / Extensive-stage Small Cell Lung Cancer (SCLC) / Platinum Sensitive Small Cell Lung Cancer (SCLC) / Platinum-Resistant Lung Small Cell Carcinoma / Extrapulmonary Small Cell Neuroendocrine Carcinoma / Prostate Small Cell Neuroendocrine Carcinoma Treatment