function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Xin-Yu & Zhang, Hua-Chuan', 2],
    ['Engel, Michael S.', 2],
    ['Girod, Christophe & Matzke, Danilo', 6],
    ['Guo, Mingxia & Xing, Lida & Wang, Bo & Zhang, Weiwei', 4],
    ['Ho, George Wai Chun & Nishikawa, Masaru', 1],
    ['Kamimura, Yoshitaka & Ferreira, Rodrigo L.', 4],
    ['Kamimura, Yoshitaka & Nishikawa, Masaru & Lee, Chow-Yang', 2],
    ['Karthik, C. M. & Kalleshwaraswamy, C. M.', 2],
    ['Mao, Yue & Engel, Michael S. & Ren, Dong & Gao, Taiping', 2],
    ['Miles, Claire', 31],
    ['Nishikawa, Masaru', 3],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Popham, Edward J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=61)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);