Differential diagnosis of causes of gastroparesis

Differential diagnosis of causes of gastroparesis 
-amyloidosis 
-paraneoplastic 
-drugs 
-anorexia nervosa 
-ididopathic 
-postviral 
-Chagas’s disease
-scleroderma 
-prophyria 
-post polio syndrome 
-multiple sclerosis 
-autonomic dysfunction 
-myotonic dystrophy 
-muscular dystrophy 
-Parkinson’s disease
-Whipple procedure 
-gastric bypass 
-fundoplication 
-partial gastric resection 
-vagotomy 
-cortisol insufficiency 
-hypothyroidism 
-diabetes mellitus