Collados, María TeresaMaría TeresaColladosBorbolla, José RafaelJosé RafaelBorbolla2023-07-122023-07-122000https://scripta.up.edu.mx/handle/20.500.12552/362610.1378/chest.118.4.1225To the Editor: We were very interested to read the article by Lopes and Maeda (November 1998).1 Our research group is also interested in the discovery of molecular, prognostic markers for primary pulmonary hypertension (PPH) by noninvasive methods; to that effect, we have also completed a research work to be published in Heart and Vessels. I would like to compare some aspects of both research findings.enResource Types::text::Non-primary product