function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arachchige, Gayashan M. & Jayakody, Sevvandi & Mooi, Rich', 1],
    ['Dursun, Ahmet & Fent, Meral', 5],
    ['Filander, Zoleka & Griffiths, Charles', 1],
    ['Ghahari, Hassan & Moulet, Pierre & Rider, David A.', 1],
    ['Krüger, Andreas & Deckert, Jürgen', 4],
    ['Lukashuk, A. O. & Saluk, S. V.', 1],
    ['Mohamed Abdelhamid, Marouf Abdel-Aty & Moustafa Azab, Mahmoud', 1],
    ['Vinokurov, N. N. & Rudoi, V. V.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);