function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Batuwita, Sudesh & Benjamin, Suresh P.', 1],
    ['Chamberlin, Joseph Conrad', 1],
    ['Edward, Karen Louise & Harvey, Mark S.', 3],
    ['Harvey, Mark S.', 4],
    ['Hou, Yanmeng & Feng, Zegang & Zhang, Feng', 14],
    ['Hou, Yanmeng & Gao, Zhizhong & Zhang, Feng', 15],
    ['Judson, Mark L. I.', 2],
    ['Li, Yun-Chun & Liu, Huai & Shi, Ai-Min', 2],
    ['Novák, János & Dányi, László', 2],
    ['Reboleira, Ana Sofia P. S. & Pérez, Antonio José', 6],
    ['Sun, Jianzhou & Guo, Xiangbo & Zhang, Feng', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=56)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);