ANSWER: A

Dr. Albert Hewett Coons was an American physician, pathologist, and immunologist who conceptualized and developed the immunofluorescence technique for labeling antibodies in the early 1940s.

Renal pathologists acquired this technique for the assessment of medical kidney biopsies, and since then it has become the gold standard on routine evaluation.

References:

Coons, AH, et al. The demonstration of pneumococcal antigen in tissues by the use of fluorescent antibody. J Immunol 1942; 45: 159-170.

Coons, AH. The beginnings of immunofluorescence. J Immunol 1961; 97: 499-503.