Collisionality and shear dependences of
density peaking in JET and extrapolation
to ITER
H.Weisen, A. Zabolotsky, C. Angioni, I. Furno, X. Garbet,
C. Giroud, H. Leggate, P. Mantic, D. Mazon, J. Weiland,
L. Zabeo, K.-D. Zastrow and JET-EFDA contributors