function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahmed, Quratulan & Thandar, Ahmed S. & Ali, Qadeer Mohammad', 1],
    ['Ali, Qadeer Mohammad & Shaikh, Iqra & Thandar, Ahmed', 1],
    ['Amon, Diva J & Ziegler, Amanda F & Kremenetskaia, Antonina', 2],
    ['Borrero-Perez, Giomar Helena & Vanegas-Gonzalez, Maria Juliana', 1],
    ['Fassbender, Nico & Stefanoudis, Paris V', 1],
    ['Gebruk, Andrey V. & Solis-Marin, Francisco A.', 16],
    ['Massin, Claude & Uthicke, Sven & Purcell, Steven W.', 4],
    ['O’Loughlin, P. Mark & Harding 1, Caroline & Paulay, Gustav', 3],
    ['Rowe, Frank & Richmond, Matthew', 1],
    ['Samyn, Yves & Massin, Claude & Vandenspiegel, Didier', 1],
    ['Villanueva, Brenda Anaid Yanez & Solis-Marin, Francisco Alonso', 2],
    ['Yves', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=42)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);