function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Chien-Lin & Chan, Tin-Yam', 1],
    ['Criales, María M. & Lemaitre, Rafael', 1],
    ['Goy, Joseph W.', 3],
    ['Goy, Joseph W. & Cardoso, Irene A.', 3],
    ['Hendrickx, Michel E. & Ayón-Parente, Manuel', 2],
    ['Pachelle, Paulo P. G. & Leray, Matthieu & Anker, Arthur', 1],
    ['Saito, Tomomi & Fujita, Yoshihisa', 3],
    ['Saito, Tomomi & Okuno, Junji & Anker, Arthur', 2],
    ['Wicksten, Mary K.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);