You will be shown the abstract of a medical clinical trial report. Your task is to extract all the findings from this report into a JSON array. Each finding should contain the following five elements:

- Intervention: The medical intervention being tested. This should be a text span copied from the input passage.
- Comparator: The baseline against which the intervention is being evaluated. This should be a text span copied from the input passage. If no comparator is reported, set to `null`.
- Outcome: The medical outcome whose effect is being measured. This should be a text span copied from the input passage.
- Effect: The effect of the intervention on the outcome, relative to the comparator. The effect should be one of the following three values: ("significantly increased", "significantly decreased", "no significant difference").
- Evidence: The evidence for the effect. This should be a text span copied from the input passage.

Please format your output as a JSON array. Each entry in the output should be an array containing the 5 elements listed above, in the following order: [<intervention>, <comparator>, <outcome>, <effect>, <evidence>].

For example, an output with two findings might read:
```
[["aspirin", "placebo", "headache severity", "significantly decreased", "Mean headache severity was significantly decreased in the aspirin group compared to the placebo group (p < 0.05)."], ["aspirin", "placebo", "weight loss", "no significant difference", "We did not observe any difference in weight loss between the group given aspirin relative to the control group"]]
```

There are 4 finding(s) in the abstract below. Please extract them. Output only the JSON array with these 4 findings. Do not include any additional text.

Abstract:
ABSTRACT.BACKGROUND AND STUDY AIMS: 
 The aim of this pilot randomized controlled trial was to evaluate and compare the satisfaction of the endoscopist along with the effectiveness and safety of sedation between sedation protocol using a combination of propofol (PF) and dexmedetomidine (DEX) (Combination group) and sedation protocol using PF alone (PF group) during gastric endoscopic submucosal dissection (ESD).


ABSTRACT.PATIENTS AND METHODS : 
Fifty-eight patients with gastric neoplasias scheduled for gastric ESD were enrolled and randomly assigned to the two groups. The satisfaction scores of the endoscopists and the parameters for the effectiveness and safety of sedation were evaluated by comparisons between the two groups.


ABSTRACT.RESULTS : 
The satisfaction scores of the endoscopists, which were measured using a visual analogue scale, were significantly higher in the Combination group than in the PF group (88 vs. 69,
P
 = 0.003). The maintenance dose of PF was lower in the Combination group than in the PF group (2 mg/kg/h vs. 5 mg/kg/h,
P
 < 0.001), and the number of rescue PF injections was fewer in the Combination group than in the PF group (2 times vs. 6 times,
P
 < 0.001). The incidence of bradycardia (defined as a pulse rate ≤ 45 bpm) in the Combination group was higher than that in the PF group (37.9 % vs. 10.3 %,
P
 = 0.029).


ABSTRACT.CONCLUSIONS : 
This study suggests that gastroenterologist-directed sedation using a combination of PF and DEX during gastric ESD can enhance the satisfaction levels of endoscopists by providing stable sedation with an acceptable safety profile.


Findings:
[["combination of propofol (PF) and dexmedetomidine (DEX) (Combination group)", "PF alone (PF group)", "the incidence of bradycardia", "significantly increased", "The incidence of bradycardia (defined as a pulse rate \u2264 45 bpm) in the Combination group was higher than that in the PF group (37.9 % vs. 10.3 %,\r\r\r\r\nP\r\r\r\r\n = 0.029)."], ["combination of propofol (PF) and dexmedetomidine (DEX) (Combination group)", "PF alone (PF group)", "The maintenance dose of PF", "significantly decreased", "The maintenance dose of PF was lower in the Combination group than in the PF group (2 mg/kg/h vs. 5 mg/kg/h,\r\r\r\r\nP\r\r\r\r\n \u003c 0.001), "], ["combination of propofol (PF) and dexmedetomidine (DEX) (Combination group)", "PF alone (PF group)", "the number of times a rescue PF injection", "significantly decreased", "the number of rescue PF injections was fewer in the Combination group than in the PF group (2 times vs. 6 times,\r\r\r\r\nP\r\r\r\r\n \u003c 0.001)"], ["combination of propofol (PF) and dexmedetomidine (DEX) (Combination group)", "PF alone (PF group)", "The satisfaction scores", "significantly increased", "The satisfaction scores of the endoscopists, which were measured using a visual analogue scale, were significantly higher in the Combination group than in the PF group (88 vs. 69"]]