Is X(3872) really a molecular state? Yan-Rui Liu, Xiang Liu, Wei-Zhen Deng and Shi-Lin Zhu Eur. Phys. J. C, 56 1 (2008) 63-73 Published online: 07 June 2008 DOI: 10.1140/epjc/s10052-008-0640-4