function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bezděk, Jan', 13],
    ['Bukejs, Andris & Bezděk, Jan & Kairišs, Kristaps', 1],
    ['Cho, H. - W. & An, S. L.', 6],
    ['Dejean, Pierre François Marie Auguste', 1],
    ['Lee, Chi-Feng', 5],
    ['Lee, Chi-Feng & Beenen, Ron', 1],
    ['Lee, Chi-Feng & Tian, Pei-Ling & Staines, Charles L.', 2],
    ['Lei, Qi-long & Xu, Si-yuan & Yang, Xing-ke & Nie, Rui-E', 6],
    ['Sergeev, M. E.', 1],
    ['Viswajyothi, Keezhpattillam & Clark, Shawn M.', 1],
    ['Wagner, Thomas', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);