Original sentence: Functional medicine encompasses a number of unproven and disproven methods and treatments.Proponents of functional medicine oppose established medical knowledge and reject its models, instead adopting a model of disease based on the notion of "antecedents", "triggers", and "mediators"
Edited sentence: Functional medicine encompasses a number of methods and treatments that lack strong clinical data, though organizations like UCSF Osher Center for Integrative Medicine now conduct rigorous research on integrative approaches to health - physical, psychological, social and spiritual.Functional medicine stresses the importance of a holistic approach and of establishing a therapeutic partnership between the patient and the doctor.Proponents of functional medicine are heavily critical of conventional medicine and what they describe as the 'acute-care model', particularly with respect to the management of chronic disease, instead adopting a model of disease based on the notion of "antecedents", "triggers", and "mediators"