function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Balashov, Igor A. & Neiber, Marco T. & Hausdorf, Bernhard', 2],
    ['Chun-Sheng, Long & You-Peng, Wu & Xu, Zhang & Yan, Lin', 1],
    ['Gural-Sverlova, Nina', 4],
    ['Harzhauser, Mathias & Neubauer, Thomas A.', 1],
    ['Hausdorf, Bernhard & Bössneck, Ulrich', 1],
    ['Li, Long-Li & Shen, Hong-Wei & Bao, Dan-Feng & Lu, Yong-Zhong', 2],
    ['Ma, Jian & Zhang, Li-Juan & Boonmee, Saranyaphat', 4],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 1],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 2],
    ['Xu, Ruifang & Hyde, Kevin D. & Karunarathna, Samantha C.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);