Footnotes

• Declaration All the authors declare that the manuscript has not been submitted for consideration or published elsewhere, none of the paper's contents have been previously published, and that there is no competing interest or financial funding

• Contributors NCT: involved in reporting and planning of the manuscript, responsible for the overall content. CCT: involved in review of manuscript, conduct of the investigations performed. CCK: overall incharge of the conceptualisation of the manuscript, attending physician of the patient.

• Competing interests None.

• Provenance and peer review Not commissioned; internally peer reviewed.