Davis 2001.

Methods	Randomisation: computer‐generated random numbers. Allocation concealment: by telephone. Follow up: complete (A). Blinding: caregiver blinded only.
Participants	16 women with gestational hypertension.
Interventions	Exp: glyceryl trinitrate skin patch (10 mg) for 12 hr/day until delivery. Control: no patch.
Outcomes	Women: pre‐eclampsia; side‐effects.
Notes	Study aimed to recruit 200 women. Discontinued early after 16 women recruited, because all women with active patches developed severe headaches, which led them to remove the patch and withdraw from the study.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ Adequate