 His studies of autopsy reports of the patients died of tropical eosinophilia helped to define the pathology of the disease for the first time and established "positive leucocyte adhesion phenomenon with M. bancrofit".He developed a novel bronchography technique and made innovations in tomography procedures.His researches also covered several other diseases such as cerebral malaria, basal tuberculosis, lung atelectasis, bronchiectasis, emphysema, bagassosis, byssinosis, and high altitude pulmonary oedema, among others.