function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Assing, Volker & Brachat, Volker & Meybohm, Heinrich', 1],
    ['Chandler, Donald S. & Geromini, Sarah D.', 4],
    ['Fancello, Luca & Hernando, Carles & Leo, Piero', 1],
    ['Hlaváč, Peter', 1],
    ['Sabella, Giorgio & Besuchet, Claude & Kurbatov, Sergey A.', 14],
    ['Sabella, Giorgio & Brachat, Volker & Kurbatov, Serguei A', 13],
    ['Sabella, Giorgio & Poggi, Roberto', 4],
    ['Sabella, Giorgio & Viglianisi, Fabio Massimo & D’Urso, Vera', 1],
    ['Sabella, Giorgio & Šíma, Adam', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=49)',
    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);