Cytokine & Growth Factor Reviews publishes thought-provoking articles (critical reviews, state-of-the-art reviews, letters to the editor, meeting reviews) devoted to important advances in the rapidly changing fields of growth factor and cytokine research. Major emphasis is placed on the multidisciplinary significance of cytokines and growth factors in areas as diverse as signal transduction, cell growth and differentiation, embryonic development, immunology, tumorigenesis and clinical medicine.