function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calder, Dale R.', 2],
    ['Calder, Dale R. & Choong, Henry H. C.', 4],
    ['Cantero, A. L. Peña & Svoboda, A. & Vervoort, W.', 1],
    ['Galea, Horia R.', 2],
    ['Galea, Horia R. & Häussermann, Verena & Försterra, Günter', 1],
    ['Galea, Horia R. & Schories, Dirk', 2],
    ['Gil, Marta & Ramil, Fran', 2],
    ['Gil, Marta & Ramil, Fran & Agís, José Ansín', 1],
    ['Gravili, Cinzia & Vito, Doris De & Camillo, Cristina Gioia Di', 1],
    ['Kubota, Shin & Yamada, Mayumi', 1],
    ['OLIVEIRA, OTTO M. P. & MIRANDA, THAÍS P. & ARAUJO, ENILMA M.', 15],
    ['Peña Cantero, Álvaro L.', 2],
    ['Soto, Joan J. & Peña, Álvaro L.', 2],
    ['Watson, Jeanette E.', 2],
    ['ÁLVARO L. PEÑA CANTERO', 3],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=43)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);