Norma relacionada
Practice Relating to Rule 25. Medical Personnel
Section A. Respect for and protection of medical personnel
Sweden’s IHL Manual (1991) considers that Article 15 of the 1977 Additional Protocol I on the protection of medical personnel has the status of customary law. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 2.2.3, p. 18.