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Ancel Keys and Austin Henschel, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Ancel Keys and Austin Henschel, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Ancel Keys and Austin Henschel, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Ancel Keys and Henry Blackburn,  Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Angie Sturgeon, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Angie Sturgeon performing an x-ray, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Angie Sturgeon with study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Austin Henschel with study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Austin Henschel with study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Austin Henschel with study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Austin Henschel with study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Austin Henschel with study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Austin Henschel with study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Austin Henschel with study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Commemorative banquet, Minneapolis, Minnesota
Conducting Research, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Conducting research, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Conducting Research, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Conducting research, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Ernst Simonson and Olaf Mickelsen, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Ernst Simonson recording a ballistocardiogram, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Evaluating an x-ray, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Finger pulse, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Henry Blackburn and Ronald Prineas, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Henry Blackburn with faculty, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Josef Brozek measuring the study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Minnesota Business and Professional Men's Study, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Minnesota Business and Professional Men staff and subjects, Minneapolis, Minnesota
Office, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Office, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Study participant, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Study participants and staff, Laboratory of Physiological Hygiene, Minneapolis, Minnesota
Toe pulse, Laboratory of Physiological Hygiene, Minneapolis, Minnesota