function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahmad, Syed Kamran & Usman, Syeda Uzma & Khan, Farmanur Rahman', 5],
    ['Engel, Michael S.', 1],
    ['Gadallah, Neveen S. & Soliman, Ahmed M. & Abu El-Ghiet, Usama M.', 4],
    ['Janšta, Petr', 1],
    ['Lima, Alessandro Rodrigues & Dias, Priscila Guimarães', 13],
    ['Madl, M.', 4],
    ['Madl, M. & Schwarz, M.', 12],
    ['Madl, M. & Schwarz, M. & K, Micrapion', 19],
    ['Madl, Michael', 12],
    ['Madl, Michael & Schwarz', 3],
    ['Nagase, Hirohiko', 1],
    ['Torretta, Juan Pablo & Molina, Gonzalo A. R. & Aquino, Daniel A.', 1],
    ['Walker, Francis', 14],
    ['Ye, Xin-hai & van Achterberg, Cornelis & Yue, Qi & Xu, Zai-fu', 13],
    ['Yildirim, Erol & Tezcan, Serdar', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=107)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);