Symptom Information: Sort according to HPO 

	Symptom Information	Symptom	Abundance	Frequency	Pubmed	Source	DB Freq
1	(HPO:0000512)	Abnormal electroretinogram	Very frequent [Orphanet]				61 / 7739
2	(HPO:0000613)	Photophobia	Frequent [Orphanet]				158 / 7739