Stem cell, Granulocyte Colony Stimulating Factor and or Dihexa to promote limb function recovery in a rat sciatic nerve damage repair model: Experimental animal studies ScienceDirect Frontiers Hepatocyte growth factor mimetic protects lateral line hair cells from aminoglycoside exposure First in human trial Fastest Contract Research Organization First in Human Clinical Trials Considerations Simbec Orion Is Dihexa an approved and safe treatment for cognitive impairment or neurodegenerative diseases such as Alzheimer disease?