A literature search for relevant studies was performed in MEDLINE (reference period: 1950 to August, 2015), the Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library, Issue 7, 2015), EMBASE (1974 to August 2015) and CINAHL (1982 to August 2015) was performed.The key words used were: “low birth weight” and “premature” or “preterm” and “plastic barrier” or “plastic wrap” or “polyethylene” or “plastic bag”, with restrictions of children and clinical trials. The reference lists in the retrieved publications were manually searched to identify additional relevant studies. Two reviewers independently screened all abstracts for eligibility. In the event of any disagreement, a consensus was reached
by discussion.