function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Can, İlyas & Gülmez, Yaşar', 8],
    ['Danilov, Yu. N. & Odintseva, A. A. & Odintsev, O. A.', 1],
    ['Else, George R. & Bolton, Barry & Broad, Gavin R.', 2],
    ['Jacobs, Hans-Joachim & Liebig, Wolf-Harald', 6],
    ['Jahantigh, Fatemeh & Rakhshani, Ehsan & Mokhtari, Azizollah', 3],
    ['Mokrousov, M. V. & Proshchalykin, M. Yu. & Aliyev, Kh. A.', 2],
    ['Schedl, Wolfgang', 1],
    ['Schmid, C.', 1],
    ['Stetsun, Halyna', 1],
    ['Yue, Dan & Li, Qiang & Ma, Li', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);