Connective Tissue CellsConnective TissueConnective Tissue DiseasesFibroblastsConnective Tissue Growth FactorMicroscopy, ElectronPlatelet-Derived Growth FactorCollagenSkinCells, CulturedMixed Connective Tissue DiseaseImmunohistochemistryRNA, MessengerGranulation TissueImmediate-Early ProteinsIntercellular Signaling Peptides and Proteins