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Table 3 Additional information collected with each phone call

From: Does metformin improve vascular health in children with type 1 diabetes? Protocol for a one year, double blind, randomised, placebo controlled trial

  0-3 months 3-12 months
Side effects 2 weekly telephone calls Monthly telephone calls
- hypoglycaemia (number, severity)
- gastrointestinal symptoms (nausea, vomiting, diarrhoea, anorexia)
- rash
- other side effects
Insulin requirements