function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Benmansour, Bouchra & Hassine, Oum Kalthoum Ben', 1],
    ['Diaz, Analía R. & Álvarez, Victor Hugo Merlo', 1],
    ['Dippenaar, Susan M.', 2],
    ['Irigoitia, Manuel M. & Cantatore, Delfina M. P.', 1],
    ['Irrigoitia, Manuel M. & Taglioretti, Verónica & Timi, Juan T.', 1],
    ['Lebepe, Modjadji C. & Dippenaar, Susan M.', 6],
    ['Luque, José L. & Tavares, Luiz E. R.', 1],
    ['Montes, Martin M. & Gómez, Sebastián & Castro, Raúl R.', 4],
    ['Ramdane, Zouhir & Trilles, Jean-Paul', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);