In the remaining cases , cancers were visible when retrospectively assessed , but were not diagnosed because of radiological detection and interpretation errors ( @ -LSB- @ % -RSB- ) , misclassification by the protocol ( two -LSB- @ % -RSB- ) , participant non-compliance ( two -LSB- @ % -RSB- ) , and non-adherence to protocol ( one -LSB- @ % -RSB- ) .