We provide the Readers with Methodological Handbook, entitled Migration of population, which discusses statistical surveys on internal and international migrations, conducted in accordance with the Program for official statistics.

Underweight in case of children means body weight under 10th percentile. Overweight in case of children is considered between 90th and 97th percentile. Obesity in case of children is defined as body weight over 97th percentile

A deficiency in stature is diagnosed when the child's body height is below 10 percentile.