Please assess the completion status of the following clinical trial:

Trial Title: A Prospective Study of Prophylactic Gastrostomy in Head and Neck Cancer Patients Undergoing Chemoradiotherapy

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

Eligibility Criteria:
Inclusion Criteria:~* pathologically confirmed of head and neck cancer~* plan to have chemoradiotherapy session~* Performance status of 0-2~Exclusion Criteria:~* contraindications for percutaneous gastrostomy, eg coagulopathy, obstructed tumor~* Body mass index less than 16 kg/m2

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- control (Type: NO_INTERVENTION): nutrition counselling with nasogastric tube insertion in the cases of weight loss more than 10% or severe mucositis developed during chemoradiotherapy
- prophylactic percutaneous gastrostomy (Type: EXPERIMENTAL): prophylactic percutaneous gastrostomy with nutrition counselling

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