Assessing the educational quality of ‘YouTube’ videos for facelifts

The Measurement of Observer Agreement for Categorical Data

J. Richard Landis, Gary G. Koch · Biometrics · 1977 · 78.9K citations · Full text

Public Health, Biostatistics, Categorical Data Analysis +12

A Coefficient of Agreement for Nominal Scales

Jacob Cohen · Educational and Psychological Measurement · 1960 · 41.3K citations

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The Deep-Plane Rhytidectomy

Sam T. Hamra · Plastic & Reconstructive Surgery · 1990 · 503 citations

Medicine, Plastic Surgery, Surgery +14