Very common (≥ 1/ 10), Common (≥ 1/ 100 to <  1/ 10), Uncommon (≥ 1/ 1000 to <  1/ 100), Rare (≥ 1/ 10,000 to <  1/ 1000), Very Rare (<  1/ 10,000) and Not known (events not reported in registration trials cannot be estimated from postmarketing spontaneous reports)