function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['BORDA, ELIZABETH', 3],
    ['Borda, Elizabeth', 1],
    ['Harding, W. A.', 1],
    ['Harding, W. A. & Moore, John Percy', 2],
    ['Huang, Taifu & Liu, Zhiwei & Gong, Xiaoyan & Wu, Tao & Liu, Hui', 2],
    ['Kappes, Heike', 2],
    ['Lai, Yi-Te & Nakano, Takafumi & Chen, Jiun-Hong', 3],
    ['Moore, John Percy', 1],
    ['Nakano, Takafumi & Jeratthitikul, Ekgachai & Nguyen, Tao Thien', 1],
    ['Ngamprasertwong, Thongchai & Thirakhupt, Kumthorn', 2],
    ['Paredes-León, Ricardo & García-Prieto, Luis', 1],
    ['Tessler, Michael & Siddall, Mark E.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);