It is an object of the present invention to provide the clinicians with a new application for ligands specific to MHC-class I antigens, especially HLA-ABC antigens, this new application residing in the detection and diagnosis of endometriosis. The device includes a measuring device housing having a wall, and a scanning unit arranged in the housing, the scanning unit including a scanning head in the form of a Ferraris sensor, and wherein an eddy current body of the Ferraris sensor includes at least a portion of the wall of the measuring device housing. The toe receiving member is configured to engage the toe portion of the boot. Each of said structures comprises a plurality of radiation elements. In particular, the invention relates to a medicament comprising the said derivative or a salt thereof as an active ingredient which is used for preventive andor therapeutic treatment of a neurodegenerative disease caused by abnormal activity of GSK3\u03b2 or GSK3\u03b2 and cdk5p25, such as Alzheimer disease.