Please assess the completion status of the following clinical trial:

Trial Title: The Efficacy and Safety Study of Electro-acupuncture for Severe Chronic Functional Constipation

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: TRIPLE
- Phase: PHASE2
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* meeting the diagnosis of Rome III criteria for chronic functional constipation;~* severe chronic constipation: two or fewer spontaneous complete bowel movements per week for more than 3 months;~* 18-75 years old;~* no use of medicine for constipation during the two weeks before enrollment (except rescue medication);~* no acupuncture treatment for constipation in recent 3 months;~* never joined any other trial in process in 3 months;~* volunteered to join this research and signed the informed consent.~Exclusion Criteria:~* Irritable bowel syndrome (IBS) and constipation caused by endocrine, metabolic, nervous or postoperative diseases or drugs;~* constipation accompanied by serious cardiovascular, hepatic, renal, or psychiatric disease, cognitive dysfunction or aphasia, or severe dystrophy affecting the cooperation for examination or treatment;~* pregnant women or women in lactation period~* constipation accompanied by abdominal aneurysm, hepatosplenomegaly, etcetera;~* bleeding disorders, or regular anticoagulant drug users, such as warfarin and heparin, etcetera;~* cardiac pacemaker carrier.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- electro-acupuncture (Type: EXPERIMENTAL): 1. The electric stimulator is applied to bilateral ST25andSP14 with dilatational wave10/50 Hz and electric current0.1-1.0mA.They are given acupuncture with 0.3×50mm or 0.35×75mm needles by inserting30-70mm and twirling lifting andthrusting 3 times.Dosage:The needle arrives the abdominal muscle layer(patients feel painful and acupuncturists feel touching hard).~2. Bilateral ST37 are given conventional acupuncture with 0.30mm×40mm needles by inserting 25-30mm and twirling lifting and thrusting for 3.Dosage:Local sour and heavy feeling is the appropriate dose.~Every session lasts for 30min/day.The participants are treated continuously for 8 weeks.During 8-week treatment the first 2 weeks,5 sessions per week,and 3 sessions per week in the rest 6 weeks,28 sessions for each patients in total.
- sham electro-acupuncture (Type: SHAM_COMPARATOR): 1. The electric stimulator is applied to bilateral sham ST25 and sham SP14 with dilatational wave, 10/50 Hz and electric current 0.5mA. The mental wire has been cut off with a same outlook as the treatment group. The electric stimulator is looked normal but with no current output. The needle is inserted by 3mm-5mm (the needle can be vertically fixed on the skin).~2. Bilateral ST37 are given acupuncture with 3mm-5mm (the needle can be vertically fixed on the skin).~Length of Treatment and the treatment sessions are the same as treatment group.

Based on this trial design, predict the completion outcome and termination type (if applicable).

Answer: outcome: complete