All
 A11 Cells D002477 +
 A11.118 Blood Cells D001773 +
 A11.118.637 Leukocytes D007962 +
 A11.118.637.555 Leukocytes, Mononuclear D007963 +
 A11.118.637.555.567 Lymphocytes D008214 +
 A11.118.637.555.567.569 T-Lymphocytes D013601 +
 A11.118.637.555.567.569.200 CD4-Positive T-Lymphocytes D015496 +
 A11.118.637.555.567.569.200.400 T-Lymphocytes, Helper-Inducer D006377 +
 A11.118.637.555.567.569.200.800 T-Lymphocytes, Suppressor-Inducer D017112