function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ebejer, Martin J. & Gatt, Paul', 1],
    ['Ebejer, Martin J. & Nicolosi, Giuseppe', 1],
    ['El-Hawagry, Magdi S. & Abdel-Dayem, Mahmoud S.', 1],
    ['Ozerov, A. L. & Krivosheina, M. G.', 2],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 1],
    ['Papp, L.', 9],
    ['Stuke, Jens-Hermann', 25],
    ['Stuke, Jens-Hermann & Barták, Miroslav', 5],
    ['Stuke, Jens-Hermann & Freidberg, Amnon', 10],
    ['Stuke, Jens-Hermann & Tago, Toshihiro', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=56)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);