Meget almindelig (≥ 1/ 10); Almindelig (≥ 1/ 100 til < 1/ 10); Ikke almindelig (≥ 1/ 1. 000 til < 1/ 100); Sjælden (≥ 1/ 10. 000 til < 1/ 1. 000); Meget sjælden (< 1/ 10. 000) inklusive enkeltstående rapporter.
Frequency is defined using the following convention: very common (≥ 1/ 10); common (≥ 1/ 100 to < 1/ 10); uncommon (≥ 1/ 1,000 to < 1/ 100); rare (≥ 1/ 10,000 to < 1/ 1,000); very rare (< 1/ 10,000) including isolated reports.