function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Guo, Mingxia & Xing, Lida & Wang, Bo & Zhang, Weiwei', 2],
    ['Holovachov, Oleksandr', 14],
    ['Kanzaki, Natsumi & Herrmann, Matthias & Weiler, Christian', 9],
    ['Kanzaki, Natsumi & Ragsdale, Erik J. & Herrmann, Matthias', 1],
    ['Khudhir, Manda & Hodda, Mike & Nicholas, Evelyn', 7],
    ['Shahina, F. & Nasira, K. & Firoza, K. & Erum, Y. I.', 5],
    ['Tahseen, Qudsia & Ahlawat, Shikha & Asif, Mohammad', 3],
    ['Von W. Schneider', 4],
    ['Wilhelm Schneider', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=50)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);