XL: participated in the concept origination, design, analysis and interpretation of data, drafting all of figures and manuscript.
For preparation of the final drafts of all figures, we thank C. Abraczinskas.
GMA conceived of the paper, collected the examples, completed the first draft of the figures, managed the manuscript, edited the article substantially, and is the guarantor.
JMG designed the study, oversaw all aspects of the study, interpreted the data and prepared final drafts of all figures as well as wrote the manuscript.
US generated a rough draft of one figure.
FSSL contributed to the collection of data, drafting of the article, generation of figures, and collection of images.
RN conceived the project idea, carried out all the data analysis from raw files to the generation of figures and drafting the manuscript.
JAGP: study design, clinical and laboratory data collection, analysis and interpretation of data, wrote manuscript; RC: collection and analysis of data, drafting the figures; MVH, VRE and JR: clinical and laboratory data collection; IH: autoantibodies determination and analysis of data; JDC and RS: study design, analysis, interpretation of data and wrote manuscript.
XL prepared extant and fossil material, contributed to the preparation of figures, and drafted the manuscript.
OB prepared extant and fossil material, contributed to the preparation of figures, and drafted the manuscript, and is the sole responsible for the content of the Discussion section.
DSB was involved in conception and design of the study, was responsible for patient inclusion, acquisition of material and clinical data, performed statistical analysis, and drafted the manuscript including preparation of figures and tables.
