For citations:

TAKAMURA N., KONDOH T., OHGI S., ARISAWA K., MINE M., YAMASHITA Sh., AOYAGI K. ABNORMAL FOLIC ACID HOMOCYSTEINE METABOLISM AS MATERNAL RISK FACTORS FOR DOWN SYNDROME IN JAPAN. Health and Ecology Issues. 2004;(1):41-44. (In Russ.) https://doi.org/10.51523/2708-6011.2004-1-1-7