You will be shown inclusion or exclusion criteria for a clinical trial. Given these criteria, your task is to extract all unique entities of the following types: ["Observation", "Condition", "Procedure", "Drug", "Temporal", "Multiplier", "Qualifier", "Negation", "ReferencePoint", "Scope", "Value", "Mood", "Device", "Visit", "Measurement", "Person"].

Please return the output as a JSON object of the format: {"Condition" : ["breast cancer", ...], "Device" : ["ports", ...], "Drug" : ["Atenolol", ...], "Measurement" : ["blood pressure", ...], "Mood" : ["suspected", ...], "Multiplier" : ["more than two", ...], "Negation" : ["no", ...], "Observation" : ["history", ...], "Person" : ["male", ...], "Procedure" : ["surgery", ...], "Qualifier" : ["severe", ...], "ReferencePoint" : ["enrollment", ...], "Scope" : ["infection", ...], "Temporal" : ["one day", ...], "Value" : ["50%", ...], "Visit" : ["ICU", ...]}. 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:

1. Patient age ≥ 12 years 
2. Presence of P. knowlesi malaria, confirmed by positive blood smear with asexual forms of P. knowlesi. 
3. Temperature >38C on admission or fever during the preceding 48 hours 
4. Enrolled within 18 hours of commencing antimalarial treatment 
5. Written informed consent from patient or attending relative able to and willing to give informed consent. Consent form and information sheets will be translated into Malay and copies provided to the patient.
{"Condition": ["P. knowlesi malaria"], "Device": [], "Drug": [], "Measurement": ["blood smear", "Temperature"], "Mood": [], "Multiplier": [], "Negation": [], "Observation": ["Enrolled"], "Person": ["age"], "Procedure": ["antimalarial treatment"], "Qualifier": ["with asexual forms of P. knowlesi"], "ReferencePoint": ["commencing antimalarial treatment"], "Scope": [], "Temporal": ["within 18 hours"], "Value": ["\u003e38C", "\u2265 12 years", "positive"], "Visit": []}