function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bertoloni, Giuseppe', 1],
    ['Carr, Martin & Cotton, Samuel & Földvári, Mihály', 2],
    ['El-Hawagry, Magdi S. & Abdel-Dayem, Mahmoud S.', 2],
    ['Feijen, Hans R.', 2],
    ['Feijen, Hans R. & Feijen, Cobi', 29],
    ['Feijen, Hans R. & Feijen, Frida A. A. & Feijen, Cobi', 8],
    ['Földvári, Mihály & Pomiankowski, Andrew & Cotton, Samuel', 5],
    ['Kaltenbach, Thomas & Gattolliat, Jean-Luc', 2],
    ['Linnaeus, Carolus', 1],
    ['Liu, Liqun & Wu, Hong & Yang, Ding', 5],
    ['Lonsdale, Owen', 1],
    ['McAlpine, David', 1],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 2],
    ['Perkovsky, E. E. & Mostovski, M. B. & Henderickx, H.', 4],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=72)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);