6 Lee Lee YK YK ,  Lee Lee PY PY ,  Ng Ng CJ CJ ,  et al et al Usability and utility evaluation of the web-based “should I start insulin?” patient decision aid for patients with type 2 diabetes among older people Usability and utility evaluation of the web-based “should I start insulin?” patient decision aid for patients with type 2 diabetes among older people . The gene discussed is INS; the disease is type 2 diabetes mellitus.