Grateful MED software program used (1 feb 1986 anni – 1 feb 2001 anni)
Descrizione:
 Source:
National Library of Medicine. MEDLINE: History. National Library of Medicine. https://www.nlm.nih.gov/medline/medline_history.html. Last Reviewed Feb. 10, 2021. Accessed March 17, 2021. 
Aggiunto al nastro di tempo:
Data:
1 feb 1986 anni
1 feb 2001 anni
 ~ 15 years