You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Outcome", "Participant", "Intervention"].

Please return the output as a JSON object of the format: {"Participant" : ["patients with COPD", ...], "Intervention" : ["Atenolol", ...], "Outcome" : ["blood pressure", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

A comparative study of a new food supplement , ViviScal , with fish extract for the treatment of hereditary androgenic alopecia in young males . A controlled , randomized , double-blind , parallel-group study compared the effects of ViviScal ( a new food supplement incorporating special marine extracts and a silica compound ) with those of a fish extract in the treatment of young males with hereditary androgenic alopecia . The pretreatment histological diagnosis was alopecia with a mild to moderate perifollicular inflammation zone . The study consisted of 20 subjects who received two tablets of ViviScal once daily and 20 who received two tablets of fish extract once daily for 6 months . The mean patient age and mean duration and severity of baldness compared well between the two groups . Most patients had been treated with long-term topical 2 % minoxidil for 1 year or more prior to the study . At baseline and after 6 months ' treatment , a biopsy was taken for histological examination . A non-vellus hair count was performed at baseline and after 2 , 4 and 6 months . In the fish extract treatment group three patients withdrew from the study before the fourth month due to lack of therapeutic effect . After 6 months ' treatment , patients receiving ViviScal showed a mean increase in non-vellus hair of 38 % compared with a 2 % increase in the fish extract treatment group ( P < 0.0001 ) . In the ViviScal group , 19 ( 95 % ) subjects showed both clinical and histological cure , whereas none treated with fish extract showed any clinical or histological difference after 6 months ' treatment ( P < 0.0001 ) . In both groups , a minimal decrease in the erythemal index was observed . In conclusion , ViviScal appears to be the first highly active treatment for androgenic alopecia in young males .
{"Intervention": ["two tablets of ViviScal once daily", "two tablets of fish extract once daily", "ViviScal", "fish extract", "ViviScal , with fish extract", "minoxidil", "ViviScal ( a new food supplement incorporating special marine extracts and a silica compound )"], "Outcome": ["erythemal index", "both clinical and histological cure", "non-vellus hair count", "lack of therapeutic effect", "mean increase in non-vellus hair"], "Participant": ["hereditary androgenic alopecia", "androgenic alopecia", "three", "20", "alopecia", "males", "young"]}