This was a small follow-up study of male twins and their brothers who had previously participated in the Male Pattern Baldness Study. Study participants were sent a two page survey by mail which asked questions about their handedness, footedness and eye dominance. Also included on the questionnaire were some questions about their general health, height and weight to update data-base records.

The study was designed by Sarah Medland and Monica de Nooyer coordinated the data entry and study management.