George Washington University volunteer hotline, a descriptive study.
D002940:Circadian Rhythm; D003376:Counseling; D003419:Crisis Intervention; D006801:Humans; D010507:Periodicity; D012621:Seasons; D013333:Student Health Services / Q000706:statistics & numerical data; D013689:Telephone; D014481:United States; D014495:Universities; D014838:Volunteers