1The patient's relapse into depression was triggered by a combination of stress and lack of sleep.
2Researchers are studying the factors that contribute to relapse in individuals who have overcome addiction.
3After a year of sobriety, she experienced a relapse and began attending support groups again.
4The doctor warned that a relapse of the disease could be more severe than the initial onset.
5There is a growing concern about the high relapse rates among patients who have undergone treatment for eating disorders.