function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdel-Dayem, Mahmoud S. & Elgharbawy, Ali A. & Rasool, Iftekhar', 1],
    ['Abdel-Dayem, Mahmoud S. & Rasool, Iftekhar & Elgharbawy, Ali A.', 1],
    ['Azadbakhsh, Saeed & Nozari, Jamasb', 1],
    ['Baehr, Martin & Reid, Chris A. M.', 2],
    ['Bousquet, Yves', 3],
    ['Felix, Ron F. F. L.', 1],
    ['Felix, Ron F. F. L. & Farkač, Jan & Suleiman, Ahmed Saeed', 1],
    ['Hristovski, Slavčo & Guéorguiev, Borislav', 2],
    ['Liebherr, James K.', 1],
    ['Pellegrini, Thais Giovannini & Ferreira, Rodrigo Lopes', 2],
    ['Serrano, Artur R. M. & Capela, Rúben A.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);