function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aykut, Medený & Yildirim, Ýbrahým Halýl & Tusun, Sadreddýn', 6],
    ['Darilmaz, Mustafa C. & Kiyak, Suat', 18],
    ['Fery, H. & Hasanshahi, G. & Abbasipour, H. & W, Iran.', 1],
    ['Fery, H. & P. N & S, East', 1],
    ['Fery, Hans & Ribera, Ignacio', 1],
    ['Hájek, Jiří', 1],
    ['Hájek, Jiří & Šťastný, Jaroslav & Boukal, Milan & Fery, Hans', 8],
    ['Keller, Oliver & Schnepp, Kyle E. & Ashman, Krystal L.', 1],
    ['Nilsson, Anders N.', 2],
    ['Pérez-Hernández, Cisteil Xinum', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=40)',
    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);