Studies

Journal of Pulmonary & Respiratory Medicine: A Review on Respiratory Muscle Training Devices

https://www.hilarispublisher.com/open-access/a-review-on-respiratory-muscle-training-devices-2161-105X-1000451.pdf

Advances in Comprehensive Pulmonary Rehabilitation for COPD Patients

https://www.researchgate.net/publication/264339632_Advances_in_Comprehensive_Pulmonary_Rehabilitation_for_COPD_Patients

European Journal of Heart Failure

http://www.forumed.biz/wp-content/uploads/2013-Marco-IMR-in-CHF-1.pdf

Expert Reviews

Servei de Pneumologia, Hospital del Mar – IMIM, Departament de Ciències Experimentals i de la Salut (CEXS), Universitat Pompeu Fabra, CIBER de Enfermedades Respiratorias (CIBERES) ISC III,

2012

http://www.forumed.biz/wp-content/uploads/2012-gea-respiratory-muscles.pdf

Scientific studies about Orygen Valve

By Dr. Orozco-Levi

https://www.ncbi.nlm.nih.gov/pubmed/?term=orozco-levi+valve