This issue comes up for discussion now and then and right now at the c.net general forum.It is saddening to notice however that the old Victorian method using a thin cord around the neck to support the instrument while playing it with forearms held horisontal (elbow angle 90 degrees)quite often is recommended despite it is severely dysfunctional and potentially harmful.
To be ergonomically suitable broad elastic straps should be used and not around the neck but over one (or even better two) shoulder(s) and
the instrument held low so that it hangs only in the supporting straps with and elbow angle ca 120 degrees or more.
Only when playing very energetically a higher playing position may be preferable but this will increase the demands for stabilizing static load on hands and arms which rather should be avoided.