A group from the University of Florida, Gainesville studied the contributions of genetics and the socio-cultural concept of "color" (race) to blood pressure in 87 Puerto Ricans from the town of Guayama. The group found that social classification was better than genetic-based ancestry at predicting disease status. Taking into consideration social classification also brought to light a link between a particular gene and blood pressure that was not apparent when only genetic ancestry was considered. The study is the first to clearly show that society's concept of race may have health effects and biological effects.