Sample size and sampling
thalassemia
THALASSEMIA, RECRUITMENT, THALASSEMIA MAJOR
Inclusion criteria were patients with thalassemia major [As the study population was limited all patients with thalassemia were assessed for eligibility criteria. Then the eligible samples were allocated into 2 groups by stratified block randomization method (stratum: gender and age ± 2). Labels A and B (A = intervention and B = control) were assigned to the groups, and the block size was 4. The randomization list was generated using free online software (Study flow diagram: recruitment and allocation
to study groups