function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ghahari, Hassan & Moulet, Pierre', 8],
    ['Grimaldi, David A. & Engel, Michael S.', 2],
    ['Guo, Mingxia & Xing, Lida & Wang, Bo & Zhang, Weiwei', 2],
    ['Heiss, Ernst & Eckelt, Andreas & Lederwasch, Manfred', 18],
    ['Jung, Sunghoon & Kim, Junggon & Oh, Sumin & Heiss, Ernst', 1],
    ['Kment, Petr & Baňař, Petr & Bílý, Svatopluk', 1],
    ['Krüger, Andreas & Deckert, Jürgen', 2],
    ['Linnavuori, Rauno E.', 2],
    ['Sakenin, H. & Samin, N. & Rastegari, J. & Havaskary, M.', 6],
    ['Samin, Najmeh & E, Rauno', 2],
    ['Vinokurov, N. N. & Rudoi, V. V.', 1],
    ['Yildirim, E. & Yazici, G. & Moulet, P.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=48)',
    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);