Correspondence.

Presents several letters to the editor referencing articles and topics published in previous issues. Comments on the article titled "Politicians Who Would Practice Medicine," published in the March 13 issue; Views on studies focusing on medications to control the behavior of hyperactive children; Opinion on the article titled "Sweden's Liberated Men and Women," by Steven Kelman published in the March 13 issue; Note on abortion laws in Sweden; Evaluation of the effectiveness of Catholic schools; Information on the military situation in Southeast Asia.