. 2017 Dec 1;6(4):371–380. doi: 10.15171/jcs.2017.035

Table 1. Search strategy utilized for MEDLINE from 2000 to 2016 .

Batch Search term

#1 preterm delivery in Mesh
#2 Birth, Premature, “Births, Premature”, “Premature Births”, “Preterm Birth” , “Birth, Preterm”, “Births, Preterm”, “Preterm Births”
#3 Combination #1 and #2:” preterm delivery” OR “Birth AND Premature” AND “Premature Birth” AND “Preterm Birth” AND “Births OR Preterm”
#4 Iran[tiab] OR Iran[PL] OR Iran[ad]
#5 Combination #3 and #5
(“Preterm delivery” OR (Birth AND Premature) OR (“Premature Births”) OR “Preterm Birth” OR (Birth AND Preterm)) AND (Iran[tiab] OR Iran[PL] OR Iran[ad])
#6 Combination #5 AND 2000:2016[dp]