These claims have not been verified. This claim cannot be independently verified. The exact numbers are not fully verified. The claim could not be independently verified. Again, these claims could not be verified. These conclusions have not been verified in human studies. This claim has not been verified. However, not all these reported features have been verified. This anecdote cannot be independently verified. However, such a claim has not been independently verified. However, this performance has not been independently verified. However, such claims were not officially verified. They heard only various rumours that could not be verified. Accounts can be "verified", confirming a user's identity. The authenticity of the leaflet could not be independently verified.