function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bezzi, Mario', 1],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 1],
    ['Elgueta, Mario & Coscarón, Sixto', 4],
    ['Grimaldi, David A.', 7],
    ['Guo, Mingxia & Xing, Lida & Wang, Bo & Zhang, Weiwei', 7],
    ['Ivkovic, Marija & Doric, Valentina & Baranov, Viktor', 1],
    ['Muller, Burgert S. & Swart, Vaughn R. & Snyman, Louwrens P.', 4],
    ['Myskowiak, Justine & Nel, André', 2],
    ['Nel, André & Ploëg, Gaël De & Perrichot, Vincent', 2],
    ['Oberprieler, Stefanie K. & Yeates, David K.', 2],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 1],
    ['Panzer, Georg Wolfgang Franz', 1],
    ['Woodley, Norman E.', 2],
    ['Yang, Ding & Nagatomi, Akira', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=36)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);