function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahmed, Zubair & Colonnelli, Enzo & Meregalli, Massimo', 1],
    ['Alekseev, Vitaly I. & Bukejs, Andris', 1],
    ['Arzanov, Yu. G. & Martynov, V. V. & Nikulina, T. V.', 2],
    ['Balalaikins, Maksims & Bukejs, Andris', 4],
    ['Bukejs, Andris', 2],
    ['Colonnelli, Enzo & Nardi, Gianluca', 1],
    ['Roze, Liāna & Barševskis, Arvīds', 2],
    ['Ruchin, Alexaner B. & Egorov, Leonid V. & Alekseev, Sergei K.', 2],
    ['Yunakov, Nikolai & Nazarenko, Vitalij & Filimonov, Rostislav', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);