EntityQ643556· pop 24· linked from 55 articlesAlvin DrewSign in to saveAmerican astronautRecent publications · Crossref5 total works indexedThe blockade of immune checkpoints in cancer immunotherapy · 2012 · cited 11,805xSafety, Activity, and Immune Correlates of Anti–PD-1 Antibody in Cancer · 2012 · cited 10,729xPD-1 Blockade in Tumors with Mismatch-Repair Deficiency · 2015 · cited 8,118xThe Norm of Reciprocity: A Preliminary Statement · 1960 · cited 8,033xSafety and Activity of Anti–PD-L1 Antibody in Patients with Advanced Cancer · 2012 · cited 6,708xvia Crossref · CC0Connectionsextra-vehicular activityEntityGulf WarEventCategories1962 births20th-century Roman Catholics21st-century Roman CatholicsAfrican-American CatholicsAmerican Roman CatholicsEmbry–Riddle Aeronautical University alumniGonzaga College High School alumniLiving peopleMilitary personnel from Washington, D.C.NASA civilian astronautsRecipients of the Air MedalSpace Shuttle program astronauts