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:

Cervical spine motion : a fluoroscopic comparison during intubation with lighted stylet , GlideScope , and Macintosh laryngoscope . The question of which is the optimum technique to intubate the trachea in a patient who may have a cervical ( C ) -spine injury remains unresolved . We compared , using fluoroscopic video , C-spine motion during intubation for Macintosh 3 blade , GlideScope , and Intubating Lighted Stylet , popularly known as the Lightwand or Trachlight . Thirty-six healthy patients were randomized to participate in a crossover trial of either Lightwand or GlideScope to Macintosh laryngoscopy , with in-line stabilization . C-spine motion was examined at the Occiput-C1 junction , C1-2 junction , C2-5 motion segment , and C5-thoracic motion segment during manual ventilation via bag-mask , laryngoscopy , and intubation . Time to intubate was also measured . C-spine motion during bag-mask ventilation was 82 % less at the four motion segments studied than during Macintosh laryngoscopy ( P < 0.001 ) . C-spine motion using the Lightwand was less than during Macintosh laryngoscopy , averaging 57 % less at the four motion segments studied ( P < 0.03 ) . There was no significant difference in time to intubate between the Lightwand and the Macintosh blade . C-spine motion was reduced 50 % at the C2-5 segment using the GlideScope ( P < 0.04 ) but unchanged at the other segments . Laryngoscopy with GlideScope took 62 % longer than with the Macintosh blade ( P < 0.01 ) . Thus , the Lightwand ( Intubating Lighted Stylet ) is associated with reduced C-spine movement during endotracheal intubation compared with the Macintosh laryngoscope .
{"Intervention": ["manual ventilation via bag-mask ,", "Macintosh laryngoscopy", "GlideScope", "laryngoscopy", "intubation", "or", ", with", "to", "in-line stabilization", ", and", "Lightwand"], "Outcome": ["time to intubate", "C-spine motion", "C-spine motion during bag-mask ventilation", "longer", "C-spine movement", "Time", "C-spine motion using the Lightwand"], "Participant": []}