Differing views have been expressed on the relative weight to be given to scientific evidence versus connoisseurship. Physicist John F. Asmus, who pioneered laser-restoration techniques for Renaissance art, and who had previously examined the "Mona Lisa" in the Louvre for this purpose, published a computer image processing study in 1988 concluding that the brush strokes of the face in the painting were performed by the same artist responsible for the brush strokes of the face of the "Mona Lisa" in the Louvre, and replicated that finding in a 2016 study. However, curator Luke Syson has argued that science is "only ever one of several factors we'd use to assess the authenticity and authorship of a work of art". An independent 2015 academic journal article also attributed the work to Leonardo on stylistic grounds.