https://www.selleckchem.com/pharmacological_epigenetics.html 0 will be included in the review. A literature search will be conducted for published studies in MEDLINE and Embase, and unpublished data in Google Scholar and ProQuest Dissertations and Theses. After a three-step search strategy, study selection will be done by two reviewers independently. Then, the COnsensus-based Standards for the selection of health Measurement INstruments (COSMIN) methodology will be applied for assessment of methodological quality, data extraction, and synthesis. PROSPERO CRD42020211727. PROSPERO CRD42020211727. Heart transplantation (HTx) surgically transects all connections to the heart, including the autonomic nerves. We prospectively examined signs, timing and consequences of early sympathetic and parasympathetic sinoatrial reinnervation, as well as explored indirect evidence of afferent cardiopulmonary reinnervation. Fifty HTx recipients were assessed at 2.5, 6 and 12 months after HTx. For comparison, 50 healthy controls were examined once. Continuous, noninvasive recordings of hemodynamic variables and heart rate variability indices were carried out at supine rest, 0.2 Hz controlled breathing, 60 degrees head-up-tilt, during the Valsalva maneuver and during handgrip isometric exercise. In HTx recipients, supine low-frequency heart rate variability gradually increased; supine high-frequency variability did not change; heart rate variability indices during controlled breathing remained unaltered; heart rate responses during tilt and isometric exercise gradually increased; the tachycardia response during Val reinnervation of cardiopulmonary low-pressure baroreceptors emerged at 12 months. Better sympathetic sinoatrial control improved heart rate responsiveness to orthostatic challenge and isometric exercise, as well as heart rate buffering of blood pressure fluctuations. There is no consensus guidance on when to reinitiate Pneumocystis jirovecii pneumonia (PJP) prophylaxis in soli