Objective To understand the content of eight mi croelements in the hair of short stature children and to probe into the factors affecting their growth retardation with relation to their medical history and the microelement levels.

Etiologic investigation of children with short stature applying rhGH in Harbin;

Etiologic analysis of 617 children with short stature;

Application and analysis of the provocation test by exercise screening and levodopa in short stature children;