Fig. 3From: Prevention of post-cardiac surgery vitamin D deficiency in children with congenital heart disease: a pilot feasibility dose evaluation randomized controlled trialEvaluation of hypercalciuria.*Numbers add up to more than 7 because one patient had both a clinical and discharge ultrasound. AB US, abdominal ultrasound; ca:cr, calcium to creatinine ratio; POD1, post-operative day 1Back to article page