Hyppighedsberegning: meget almindelig (≥1/ 10); almindelig (≥1/ 100, < 1/ 10); usædvanlig (≥1/ 1000, < 1/ 100); sjælden (≥1/ 10. 000, < 1/ 1000); meget sjælden (< 1/ 10. 000, herunder enkeltstående indberetninger).
Frequency estimates: very common (≥1/10); common (≥1/100, < 1/10); uncommon (≥1/1,000, < 1/100); rare (≥1/10,000, < 1/1,000); very rare (< 1/10,000, including isolated reports).