alcoholic polyneuropathy prognosisalcohol induced polyneuropathypolyneuritis alcoholalcoholic neuropathy treatmentsalcohol related neuropathyalcoholic neuropathy diagnosischronic alcoholic neuropathyalcoholic neuropathy recoveryalcoholic neuropathy progressionalcohol induced neuropathyalcoholic neuropathy prognosisalcoholic neuropathy reversible