function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Krikken, Jan & Li, Chun-Lin', 15],
    ['Li, Chun-Lin & Krikken, Jan & Wang, Chuan-Chan', 6],
    ['Li, Chun-Lin & Yang, Ping-Shih & Krikken, Jan & Wang, Chuan-Chan', 4],
    ['Selking, Ryan', 1],
    ['Ziani, Stefano & Bezděk, Aleš & Branco, Tristão', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);