function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akhtar, Mir Samim & Dey, Debjani & Usmani, Mohd. Kamil', 2],
    ['Broad, Gavin R. & Shaw, Mark R. & Godfray, H. Charles J.', 4],
    ['Ghahari, H. & Fischer, M. & Cetin, O. & Beyarslan, A.', 1],
    ['Ghahari, H. & Fischer, M. & Sakenin, H. & Imani, S.', 1],
    ['Kaliuzhna, M. O.', 1],
    ['Kos, Katarina & Trdan, Stanislav & Petrović, Andjeljko', 1],
    ['Lopes, Thomas & Libert, Pierre-Nicolas & Starý, Petr', 1],
    ['Madl, Michael', 1],
    ['Nazari, Yaser & Zamani, Abbas Ali & Masoumi, Seyyed Mohammad', 3],
    ['Rakhshani, Ehsan & Barahoei, Hossein & Ahmad, Zubair', 4],
    ['Rakhshani, Ehsan & Stary, Petr & Tomanovic, Zeljko', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);