fetal_thymus rs143386704 53226082 GSTA4 chr6_53225000_53230000 chr6_52855000_52860000 fetal_thymus rs143386704 53226082 GSTA4 chr6_53225000_53230000 chr6_52860000_52865000 fetal_thymus rs138881449 53226299 GSTA4 chr6_53225000_53230000 chr6_52855000_52860000 fetal_thymus rs138881449 53226299 GSTA4 chr6_53225000_53230000 chr6_52860000_52865000