Correspondence needs to be addressed; E-Mail: [email protected]; Tel.: +852-391-

Correspondence ought to be addressed; E-Mail: [email protected]; Tel.: +852-391-792-34; Fax: +852-285-597-30. External Editor: Rudiger Hardeland Received: 15 July 2014; in revised type: 26 September 2014 / Accepted: two October 2014…