The invention relates to the use of a biocompatible material based on chitosan and an acid, e. The MMRL system operates without a stencil mask. A graphical user interface permits a user to customize a set of interactive functions to be enabled for a given set of images. A pair of the LED dies are mounted at a bottom surface of the mounting groove, and two LED dies in the pair of LED dies are disposed symmetrically about an axis of the mounting groove. The invention is characterised in that the tightness between the reservoir, the module and the flash chamber is provided by a first compressed seal, and the tightness between the rod and the module is provided by a second compressed seal, the two seals being parts of one and the same elastomeric component borne by the module. The instant application further relates to the treatment of histone deacetylase related disorders and diseases related to both histone deacetylase and phosphoinositide 3-kinase.