Nature Medicine launches investigation into discrepancies in study that found cancer immunotherapy more effective in the morning.[2] The study showed that the timing of the treatment plays a key role in the results of the therapy.[2] Patients who received therapy before 3:00 PM had significantly better results.[2] The time factor affects the effectiveness of immunotherapy according to study findings.[2] The investigation aims to verify these findings in relation to the observed irregularities.[2] A study suggested an advantage of early administration of immunotherapy over a later time.[2]