Here is the design of a clinical trial:

Official Title: Surgical or Non-surgical Treatment of Plantar Fasciitis - A Randomized Clinical Trial

Included conditions:
- Fasciitis, Plantar, Chronic

Study Armgroups:
- {'label': 'Surgical', 'type': 'EXPERIMENTAL', 'description': 'Radiofrequency microtenotomy (RF): A longitudinal incision of about 3 cm will be made over the most tender part of the foot taking care to avoid the weight bearing part of the sole, and the tissues dissected down to the affected plantar fascia. After initiating sterile isotonic saline flow of 1 drop every 1-2 s from a line connected to the RF system, the TOPAZ tip will be placed onto the fascia and the micro debridements carried out in a grid like pattern on and throughout the symptomatic fascia area. After debridement, the wound will be irrigated with copious amounts of normal saline solution and closed in layers. A local anaesthetic will be injected into the skin and subcutaneous tissues around the wound and standard wound dressings will be applied', 'interventionNames': ['Procedure: Radiofrequency microtenotomy']}
- {'label': 'Non-surgical', 'type': 'ACTIVE_COMPARATOR', 'description': 'Strength training: Consists of one-legged heel lift to primarily activate the windlass effect and increase the mechanical stress on the tendon. The exercise is performed on a step, a thick book or the like, so the heel movement finishes below the horizontal level. The exercise is performed every other day with as many sets as possible and as heavy as possible, but not heavier than eight repetitions can be performed per. set. The load progressed from two to one leg +/- backpack. The exercise is performed as 3 s/2 s / 3 s concentric, isometric and eccentric respectively followed by 2 min rest. Patients continue to exercise 4 weeks after patient acceptable symptom state (PASS) has been achieved', 'interventionNames': ['Behavioral: Strength training']}

Interventions:
- {'type': 'PROCEDURE', 'name': 'Radiofrequency microtenotomy', 'description': 'A longitudinal incision of about 3 cm will be made over the most tender part of the foot taking care to avoid the weight bearing part of the sole, and the tissues dissected down to the affected plantar fascia. After initiating sterile isotonic saline flow of 1 drop every 1-2 s from a line connected to the RF system, the TOPAZ tip will be placed onto the fascia and the micro debridements carried out in a grid like pattern on and throughout the symptomatic fascia area. After debridement, the wound will be irrigated with copious amounts of normal saline solution and closed in layers. A local anaesthetic will be injected into the skin and subcutaneous tissues around the wound and standard wound dressings will be applied', 'armGroupLabels': ['Surgical']}
- {'type': 'BEHAVIORAL', 'name': 'Strength training', 'description': 'Non-surgical treatment consists of one-legged heel lift to primarily activate the windlass effect and increase the mechanical stress on the tendon. The exercise is performed on a step, a thick book or the like, so the heel movement finishes below the horizontal level. The exercise is performed every other day with as many sets as possible and as heavy as possible, but not heavier than eight repetitions can be performed per. set. The load progressed from two to one leg +/- backpack. The exercise is performed as 3 s/2 s / 3 s concentric, isometric and eccentric respectively followed by 2 min rest. Patients continue to exercise 4 weeks after patient acceptable symptom state (PASS) has been achieved', 'armGroupLabels': ['Non-surgical'], 'otherNames': ['Resistance training']}

Primary Outcomes:
- {'measure': 'Change in the Foot Health Status Questionnaire (FHSQ)', 'description': 'Subdomain foot pain score range 0-100, low values represent worse conditions', 'timeFrame': 'Change from baseline at 6 months'}

Please estimate the sample size based on the assumption: 
standard deviation of 19.7 points, two-sided significance level of 0.05, power of 80%, and accounting for possible drop-outs
Sample size
        Based on a standard deviation of 19.7 points, a two-sided significance level of 0.05, and a power of 80%, it will require 32 participants in each group to be able to detect a difference in the clinically relevant 14.1 points in the pain domain of FHSQ-DK [34]. To account for possible drop-outs, we will include a total of 70 participants.