function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baumann, Richard W. & Nelson, C. Riley', 1],
    ['Baumann, Richard W. & Stark, Bill P.', 1],
    ['Chen, Zhi-Teng', 1],
    ['Chen, Zhi-Teng & Ye, Xiao-Han', 2],
    ['Judson, Sarah W. & Nelson, C. Riley', 2],
    ['Shen, Ting & Cao, Jinjun & Li, Weihai & Bozdoğan, Hakan', 2],
    ['Shimizu, Takao', 1],
    ['Stewart, Kenneth W.', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);