Eastern Christianity
Archpriest, also protopope (Greek: πρωτοπαπᾶς, protopapas) or protopresbyter (Greek: πρωτοπρεσβύτερος, protopresbyteros), is a clerical rank, a title of honor given to non-monastic priests and is conferred by a bishop with the laying on of hands and prayer. An archpriest typically wears an epigonation, a vestment originally worn only by bishops; however, details vary locally, and in some places being given the epigonation is an honor that typically precedes being made an archpriest and in other places, it is an honor that is given to only some archpriests. An archpriest also wears a pectoral cross both as part of his street clothes and when vested. The ceremony for making an archpriest is analogous to other clerical promotions bestowed with cheirothesia: at the little entrance of the divine liturgy, the candidate is conducted to the ambo in the middle of the church where the bishop is at the time, and the bishop blesses him and says a prayer addressed to Christ asking to "... endue our brother (name) with Thy Grace, and adorn him with virtue to stand at the head of the Presbyters of Thy people, and make him to be a good example to them that are with him ..."In the Russian tradition, protopresbyter is a higher rank than archpriest, as explained in a translation by the Orthodox Church in America:

Although entitled "for the making of a Protopresbyter" it is clear that what is now known as an "Archpriest" is what is usually meant.
Prevention
A 2015 Cochrane systematic review assessing the prevention of chemotherapy-induced oral mucositis concluded that oral cryotherapy leads to large reductions in the incidence of oral mucositis of all severities in adults receiving 5-FU treatment for solid cancers. The evidence also indicates a reduction of oral mucositis in adults receiving high-dose melphalan-based cancer treatment prior to haematopoietic stem cell transplantation, although there is uncertainty regarding the size of the reduction in this instance. No evidence was found for use of this preventive measure in children. Oral cryotherapy involves the placement of rounded ice chips in the mouth, which cools the oral tissues and causes vasoconstriction. This decreases blood flow to the region and, hence, also restricts the amounts of the chemotherapy drugs delivered to the tissues. Treatment
Treatment of mucositis is mainly supportive. Oral hygiene is the mainstay of treatment; patients are encouraged to clean their mouth every four hours and at bedtime, more often if the mucositis becomes worse.Water-soluble jellies can be used to lubricate the mouth. Salt mouthwash can soothe the pain and keep food particles clear so as to avoid infection. Patients are also encouraged to drink plenty of liquids, at least three liters a day, and avoid alcohol. Citrus fruits, alcohol, and foods that are hot are all known to aggravate mucositis lesions. Medicinal mouthwashes may be used such as Chlorhexidine gluconate and viscous Lidocaine for relief of pain. However, care should be taken as the high doses of viscous lidocaine my cause adverse effects.