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", "Chemical"].

Please return the output as a JSON object of the format: {"Chemical" : ["Naloxone", ...], "Disease" : ["Hypotensive", ...]}. 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:

Apparent cure of rheumatoid arthritis by bone marrow transplantation. We describe the induction of sustained remissions and possible cure of severe erosive rheumatoid arthritis (RA) by bone marrow transplantation (BMT) in 2 patients. BMT was used to treat severe aplastic anemia which was caused by gold in one case and D-penicillamine in the other. In the 8 and 6 years since the transplants (representing 8 and 4 years since cessation of all immunosuppressive therapy, respectively), the RA in each case has been completely quiescent. Although short term remission of severe RA following BMT has been reported, these are the first cases for which prolonged followup has been available. This experience raises the question of the role of BMT itself as a therapeutic option for patients with uncontrolled destructive synovitis.
{"Chemical": ["gold", "D-penicillamine"], "Disease": ["RA", "synovitis", "aplastic anemia", "rheumatoid arthritis"]}