function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Kandari, Manal Abdulrahman & Khalaji-Pirbalouty, Valiallah', 1],
    ['Fabricius, Johann Christian', 1],
    ['K. W. Verhoeff', 1],
    ['López-Orozco, Carlos Mario & Carpio-Díaz, Yesenia M.', 1],
    ['Mead, A. & Carlton, J. T. & Griffiths, C. L. & Rius, M.', 1],
    ['Nunomura, Noboru', 1],
    ['Ocampo-Maceda, Ana Teresa & Ruelas-Cabana, Carlos Miguel', 1],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Sánchez-García, Alba & Peñalver, Enrique & Delclòs, Xavier', 4],
    ['Taiti, Stefano & Checcucci, Ilaria', 2],
    ['Taiti, Stefano & Rossano, Claudia', 1],
    ['Taiti, Stefano & Wynne, J. Judson', 1],
    ['Weber, Friedrich', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);