Nickel hypersensitivity as the cause of atrial fibrillation after patent foramen ovale closure: fact or myth?

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Abstract
This commentary refers to ‘Long-term risk of atrial fibrillation or flutter after transcatheter patent foramen ovale closure: a nationwide Danish study’, by C.V. Skibsted et al., https://doi.org/10.1093/eurheartj/ehad305.