Here is the design of a clinical trial:

Official Title: Acupuncture for Blunt Chest Trauma: A Protocol for a Double-Blind Randomized Control Trial

Included conditions:
- Chest Trauma
- Rib Fractures

Study Armgroups:
- {'label': 'Acupuncture with press tack needle group (Acu)', 'type': 'EXPERIMENTAL', 'description': 'the press tack needles (PYONEX Φ0.20×0.6 mm made by Seirin Corporation) has a diameter of 0.2 mm and length of 0.6 mm will be used on the following bilateral points; GB 36 (Waiqiu), GB 34 (YangLingQuan), ST 36 (Zusanli), LI 4 (HeGu), LU 7 (LieQue), TH 5 (Waiguan) press tack needles retention time will be 4 days.', 'interventionNames': ['Other: Press Tack Acupuncture']}
- {'label': 'Placebo group (Con)', 'type': 'PLACEBO_COMPARATOR', 'description': 'The pess tack placebo is PYONEX sticker and pack that is identical to the press needle, except that the needle part was removed. The acupuncturist will apply the stickers on the following bilateral acupoints: GB 36 (Waiqiu), GB 34 (YangLingQuan), ST 36 (Zusanli), LI 4 (HeGu), LU 7 (LieQue), TH 5 (Waiguan) press tack stickers retention time will be 4 days.', 'interventionNames': ['Other: Press Tack Placebo']}

Interventions:
- {'type': 'OTHER', 'name': 'Press Tack Acupuncture', 'description': 'PYONEX Φ0.20×0.6 mm made by Seirin Corporation', 'armGroupLabels': ['Acupuncture with press tack needle group (Acu)'], 'otherNames': ['Press Tack Needle/ sticker needle/ PYONEX']}
- {'type': 'OTHER', 'name': 'Press Tack Placebo', 'description': 'PYONEX placebo sticker made by Seirin Corporation', 'armGroupLabels': ['Placebo group (Con)'], 'otherNames': ['PYONEX placebo']}

Primary Outcomes:
- {'measure': 'Numerical Rating Scale (NRS) - rest', 'description': 'pain scale form 1-10 when 10 is the most painful', 'timeFrame': '3 months'}
- {'measure': 'Numerical Rating Scale (NRS) - mobile', 'description': 'pain scale form 1-10 when 10 is the most painful', 'timeFrame': '3 months'}

Please estimate the sample size based on the assumption: 
95% power, 20% dropout rate
2.16
        Sample size calculation
        In a previous similar study,[11] the pain scale reduced significantly as recorded immediately after acupuncture treatment. We utilized the result of this study to calculate sample size as generated by Gâpower version 3.1.9.2 software. Accordingly, in the condition of 95% power being calculated with an effect size of 1.124365. The patient number in each group should be a minimum of 18 participants. However, we also considered that a previous study included 29 patients in each group with a total of 58 patients. With respect to a dropout rate of 20%, we decided to include 36 patients in each group, for a total of 72 patients.