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: ["Disease"].

Please return the output as a JSON object of the format: {"Disease" : ["COVID-19", ...]}. 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:

Muscle expression of glucose-6-phosphate dehydrogenase deficiency in different variants. Muscle expression of G6PD deficiency has been investigated in Mediterranean, Seattle-like and A-variants. G6PD activity was detected in samples obtained from biopsies on the quadriceps muscle of seven males and one female. The type of genetic variant was determined by molecular analysis of DNA, extracted from blood samples. All variants showed the enzyme defect in muscle. A statistically significant relationship was found in the activity of G6PD between erythrocytes and muscle of the male subjects (r = 0. 968; p = 0. 00008). The equation for the best fit line was  Y = 0. 390X + 0. 198 198. The results suggest that, for a given variant, the extent of the enzyme defect in muscle may be determined, using this equation, from the G6PD activity of erythrocytes
{"Disease": ["glucose-6-phosphate dehydrogenase deficiency", "G6PD deficiency"]}