TY - GEN AU - Makarov,L M TI - [Features of the variability of the cardiac circadian rhythm under conditions of free activity] SN - 0131-1646 PY - 1998///0623 KW - Adolescent KW - Circadian Rhythm KW - physiology KW - Heart Rate KW - Humans N1 - Publication Type: Clinical Trial; Comparative Study; Journal Article ER -