Here is the design of a clinical trial:

Official Title: Efficacy of Acupuncture vs Sham Acupuncture or Waitlist Control for Patients With Chronic Planter Fasciitis: Study Protocol for a 2-center Randomized Controlled Trial

Included conditions:
- Plantar Fasciitis

Study Armgroups:
- {'label': 'Acupuncture group', 'type': 'EXPERIMENTAL', 'interventionNames': ['Other: Acupuncture']}
- {'label': 'Sham acupuncture', 'type': 'SHAM_COMPARATOR', 'interventionNames': ['Other: Sham acupuncture']}
- {'label': 'Waitlist control group', 'type': 'NO_INTERVENTION', 'description': 'Participants will receive no treatment for their heel pain for a period of 16 weeks after randomization, and subsequently have the option of 4 weeks (12 sessions) of acupuncture with free of charge at the end of follow-up.'}

Interventions:
- {'type': 'OTHER', 'name': 'Acupuncture', 'description': 'The investigators will apply two Ashi points (the two most severe tender points in the most sensitive area over the anteromedial aspect of the heels), Chengshan (BL57), Taixi (KI3) and Kunlun (BL60) in this trial. With the patient in a prone position, the local skin will be routinely sterilized followed by a 10mm diameter and 5mm thick sterile adhesive pad pasting onto each selected acupoint. Ashi points will be perpendicularly inserted through the pad to the plantar fascia layer with a depth of approximately 15-20mm depending on the location. BL57, KI3 and BL60 will be punched perpendicularly 10-15mm deep into the skin through the pad. All needles except Ashi points will be manually stimulated by small, equal manipulations of lifting, thrusting, twirling and rotating to achieve De qi. Needles will be retained for 30 minutes per treatment. During each treatment, every needle will be manipulated three times every 10 minutes.', 'armGroupLabels': ['Acupuncture group']}
- {'type': 'OTHER', 'name': 'Sham acupuncture', 'description': "Sham Ashi (0.5 cun away from Ashi, one 'cun' is equivalent to the greatest width of the individual patients' thumb, \\~1.5 cm), sham BL57 (0.5 cun lateral to true BL57 horizontally), sham KI3 (midway between true KI3 and heel tendon) and sham BL60 (midway between true BL60 and heel tendon) will be used. Treatment protocol will be similar to that of the acupuncture group. The Hwato-brand disposable blunt-tipped needles (size 0.30 × 25 mm) will be inserted at sham points through adhesive pads to the skin without skin penetration. The needles will then be lifted, thrusted, twirled, and rotated evenly three times every ten minutes. No specific de qi response will be elicited.", 'armGroupLabels': ['Sham acupuncture']}

Primary Outcomes:
- {'measure': 'The proportion of participants with treatment response 4 weeks after randomization', 'description': 'A treatment responder is defined as a participant having a minimum of 50% improvement in the worst pain intensity during the first steps in the morning compared with baseline.', 'timeFrame': 'at week 4'}

Please estimate the sample size based on the assumption: 
80% power, two-sided significance level of 0.05, 10% loss to follow-up
Sample size calculation
        Based on the results of a previous study,12 a sample size of 120 participants will be enrolled to provide 80% power to detect a difference of 35% between the combined acupuncture group and waiting-list group in the proportion of participants with treatment response 4 weeks after randomisation at a two-sided significance level of 0.05. The proportion of participants with treatment response after 4 weeks was assumed to be roughly 12% for the waiting-list group,12 with an anticipated 10% loss to follow-up.