Please assess the completion status of the following clinical trial:

Trial Title: Olfactory Training in Improving Sense of Smell After Radiation Therapy in Patients With Paranasal Sinus or Nasopharyngeal Cancer

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

Eligibility Criteria:
Inclusion Criteria:~* Eligible disease(s)/stage(s): nasopharyngeal carcinoma, paranasal sinus cancers/any stage~* Patients with paranasal sinus or nasopharyngeal carcinoma who are about to undergo radiation therapy; patients with paranasal sinus or nasopharyngeal carcinoma who have completed radiation therapy 3-6 months prior to enrollment who then show olfactory loss on a screening test (University of Pennsylvania Smell Identification Test \[UPSIT\] - score of 34 or 33 or lower out of 40, depending on female/male); both those patients undergoing chemotherapy and those who did not will be eligible, and this factor will be assessed as a possible confounder/contributor in a multi-regression analysis~* No race-ethnic restriction~* No life expectancy restriction~* No need for Karnofsky performance status~* Only requirement for organ function is for patients to have competency to consent and participate in the study; in the arm of the study which requires patients to have olfactory dysfunction before enrollment, an UPSIT score will be used to identify these patients~* Ability to understand and the willingness to sign a written informed consent document~Exclusion Criteria:~* No therapy restrictions~* No restrictions on use of other investigational agents~* Co-morbid disease or incurrent illness such as:~  * History of head trauma~ * History of nasal surgery other than biopsy (before cancer was diagnosed)~ * History of sinus surgery other than biopsy (before cancer was diagnosed)~ * Chronic rhinosinusitis with or without polyp~ * Pregnancy~ * Cognitive dysfunction~ * History of brain surgery~ * Psychiatric or neurologic diseases interfering with sense of smell~ * Congenital disorders of olfactory dysfunction~ * Olfactory loss prior to onset of nasopharyngeal carcinoma~* No allergic reactivity has been associated with olfactory training and thus there is no need for any exclusion criteria related to this~* No other agents have any possible potentiation or decreased activity related to olfactory training and thus there is no need for any exclusion criteria related to this~* There are no other agent-specific exclusion criteria~* Pregnant women will be excluded; nursing patients will be included

- Gender: ALL
- Minimum Age: 19 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Arm I (olfactory training) (Type: EXPERIMENTAL): Patients undergo olfactory training by smelling 4 essential oils in vials (rose, lemon, clove, and eucalyptus) over 15 seconds each, twice daily for 12 weeks.
- Arm II (sham training) (Type: SHAM_COMPARATOR): Patients undergo sham training by smelling canola oil in 4 vials over 15 seconds each, twice daily for 12 weeks.

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