function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bariche, Michel & Fricke, Ronald', 2],
    ['Bogorodsky, Sergey V. & Alpermann, Tilman J. & Mal, Ahmad O.', 2],
    ['Fourmanoir, Pierre', 1],
    ['Gon, Ofer & Allen, Gerald R. Dr.', 1],
    ['Gon, Ofer & Liao, Yun-Chih & Kwang-Tsao, Shao', 1],
    ['Kotthaus, Adolf', 1],
    ['Yu, Zhengsen & Song, Na & Han, Zhiqiang & Gao, Tianxiang', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);