The article "Quasimöbius maps""Quasimöbius maps" by Jussi Väisälä states that one always has the implication QM $\implies$ QC. But a proof is only given in for maps of the form $f:\dot{A} \to \dot{Y}$ where $A \subset \dot{X}$ and where $\dot{X} = X \cup \{\infty\}$ denotes the one-point extension of the metric space $X$.
Does the statement hold for all QM maps between arbitrary metric spaces? Does anyone know a reference to a paper where the relationship between QM and QC for arbitrary metric spaces is shown more clear?