Scott JR. Choice of Primary Outcomes in Randomized Trials and Systematic Reviews Evaluating Interventions for Preterm Birth Prevention: A Systematic Review. BJOG 2014; DOI:10.1111/1471-0528.12590
When a publication comes form PubMed as an epub, the DOI is usually there so it seems like it would be okay to enter it (I usually see it next to the title). I don’t know if we have a standard procedure. However, it is helpful to have it because the DOI allows a person to find that publication online.