| Database | Date of Search | Search terms |
| CINAHL database | 31 July 2015 | #1 folic acid OR folate OR vitamin B9 OR B9 vitamin OR vitamin B‐9 OR metafolin OR levomefolate OR folvite OR folacin OR 5‐methyltetrahydrofolate OR 5‐methylTHF OR 5‐MTHF OR L‐5‐MTHF #2 sickle cell OR haemoglobin S dis* OR HbS dis* #3 randomized controlled trial OR controlled clinical trial OR randomized OR placebo OR drug therapy OR randomly OR trial OR groups #1 AND #2 AND #3 Results: 7 |
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