My clinical research interest involves the areas of asthma, chronic sinusitis, immuodeficiency and reflux of nasolacrimal ducts.We pioneer a medical treatment of chronic sinusitis with close 90% healing rate. Close to 10% of these patients have immunodeficiencies. We first discovered the phenomenon of tear duct reflux when blowing nose that may lead to infection.We also first discovered a clinical entity of prolonged episodes of asthma lasting for months to years following a cold or sinus infection.